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1/16 msm6546/6546l ? semiconductor general description msm6546/6546l is a 4-bit, low-power microcontroller manufactured in a cmos silicon gate process. the microcontroller can be initialized and operated at the low supply voltage of 0.9 v. this device contains a crystal oscillator circuit, voltage converter circuits, a time base counter, a rom, a ram, a stack ram, i/o ports, interrupt function components, a serial i/o port, a buzzer output circuit, an up/down counter, and lcd drivers. this ic can be driven by one battery and is well suited to products that need to be operated with low power consumption. features ? the ic can be initialized and operated even at a low voltage of 0.9 v. ? low power consumption ? rom : 4096 words 17 bits ? ram : 256 words 4 bits ? i/o port input/output port : 7 ports 4 bits input port : 1 port 4 bits ? interrupt functions (real-time interrupt, external interrupt, and serial interrupt) ? serial i/o port : 8-bit sync communication ? buzzer output circuit ? 4-bit decimal up/down counter ? 54 lcd drivers (up to 200 segments can be displayed) ? 75 instructions ? minimum instruction execution time : 61 m s ? operation under single 1.5 v power supply (msm6546) a mask option allows the 3 v power supply to be used (msm6546l). ? built-in 32.768 khz crystal oscillator circuit ? package: 100-pin plastic qfp (qfp100-p-1420-0.65-bk) : (product name : msm6546-xxgs-bk, MSM6546L-XXGS-BK) chip indicates a code number. ? semiconductor msm6546/6546l operatable at 0.9 v and built-in lcd driver 4-bit microcontroller e2e0020-38-95 this version: sep. 1998 previous version: mar. 1996
2/16 msm6546/6546l ? semiconductor block diagram p7.3 p7.2 p7.1 p7.0 p6.3 p6.2 p6.1 p6.0 p5.3 p5.2 p5.1 p5.0 p4.3 p4.2 p4.1 p4.0 p3.3 p3.2 p3.1 p3.0 p2.3 p2.2 p2.1 p2.0 p1.3 p1.2 p1.1 p1.0 p0.3 p0.2 p0.1 p0.0 xt xtb port7 port6 port5 port4 port3 port2 port1 port0 osc tmout time base counter system clock generator cclk bu/d 4-bit bcd counter ccnt pgconh pgconl sin sout sckl mode pcziox pchzx0 pciox0 pchz0 pcio0 scnd0 scnd1 serial i/o sbffl sbffh d-bus eif eirt irqrt fiex irqex pnex irqsio prio interrupt control ram (256 4 bits) page work adrs program rom 4096 17 bits instruction register instruction decoder stack ram program counter adder frmt flag s-bus acc a-bus alu mpx tempo buzzer mdth mdtl voltage regulator bd v dd v ss1 v ss2 v ee v cp v cm lcdcnt lcd driver seg0 seg53 v ss3
3/16 msm6546/6546l ? semiconductor pin configuration (top view) 50 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 test2 test3 seg0 seg1 seg2 seg3 seg4 seg5 seg6 seg7 seg8 seg9 seg10 seg11 seg12 seg13 seg14 seg15 seg16 seg17 seg18 seg19 seg20 seg21 seg22 seg23 seg24 seg25 seg26 p7.3/cclk 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 p5.1 p5.2 p5.3 bd v ee v ss3 v ss2 v cp v cm v ss1 v dd xt xtb p6.0 p6.1 p6.2 p6.3/ sclk p7.0/sout p7.1/sin p7.2/bu/d 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 p0.1 p0.0 seg53 seg52 seg51 seg50 seg49 seg48 seg47 seg46 seg45 seg44 seg43 seg42 seg41 seg40 seg39 seg38 seg37 seg36 seg35 seg34 seg33 seg32 seg31 seg30 seg29 seg28 seg27 p5.0 p0.2 p0.3 p1.0 p1.1 p1.2 p1.3 p2.0 p2.1 p2.2 p2.3 p3.0 p3.1 p3.2 p3.3 p4.0 p4.1 p4.2 p4.3 reset test1 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 100-pin plastic qfp
4/16 msm6546/6546l ? semiconductor pin descriptions symbol type description port0 (p0.0 to p0.3) i/o 4-bit input-output port, i/o switchable, with/without input pull-down resistor i/o 4-bit input-output port, i/o switchable, with/without input pull-down resistor i/o 4-bit input-output port, i/o switchable, with/without input pull-down resistor i/o 4-bit input-output port, i/o switchable, with/without input pull-down resistor i/o 4-bit input-output port, i/o switchable, with/without input pull-down resistor i/o 4-bit input-output port, i/o switchable, with/without input pull-down resistor i/o 4-bit input-output port, i/o switchable, with/without input pull-down resistor 4-bit input port tie to the negative pole of the battery when not used. bd o buzzer output pin reset i reset pin with input pull-down resistor test1 testing pins with input pull-down resistor; tie to the negative pole of the battery. test2 i test3 xt i connection pins for crystal oscillator xtb o v dd 0 v power supply pin v ss1 C1.5 v supply pin (power supply pin for C1.5 v operation) v ss2 C3.0 v supply pin (power supply pin for C3.0 v operation) v cp connection pins for internal potential development capacitor v cm port1 (p1.1 to p1.3) port2 (p2.0 to p2.3) port3 (p3.0 to p3.3) port4 (p4.0 to p4.3) port5 (p5.0 to p5.3) port6 (p6.0 to p6.3) p2.0 to p2.3 external interrupt port p6.3: sclk shared with serial port i port7 (p7.0 to p7.3) p7.0: sout p7.1: sin p7.2: bu/d shared with 4-bit up/down counter p7.3: cclk v ee supply pin for internal logic (constant voltage circuit output pin) v ss3 C4.5 v supply pin seg0 to seg53 o lcd driver
5/16 msm6546/6546l ? semiconductor absolute maximum ratings (msm6546, 1.5 v, buf = "0") parameter symbol condition rating unit power supply voltage (1) v ss1 ta = 25c C4.0 to +0.3 power supply voltage (2) v ss2 C7.0 to +0.3 v power supply voltage (3) v ss3 C7.0 to +0.3 input voltage v in v ss1 C 0.3 to +0.3 output voltage (1) *1, *2 v o1 v ss1 C 0.3 to +0.3 output voltage (2) *2 v o2 v ss2 C 0.3 to +0.3 output voltage (3) *2 v o3 v ss3 C 0.3 to +0.3 storage temperature t stg C55 to +125 c *1 normal output *2 lcd driver output note: the input of the constant voltage circuit is equal to the output of the voltage converter (v ss2 ). note: the input of the constant voltage circuit is equal to the output of the voltage converter (v ss2 ). recommended operating conditions (msm6546, 1.5 v, buf = "0") parameter symbol condition range unit operating voltage v op C1.75 to C0.9 v v operating temperature t op C20 to +70 c oscillation frequency f osc 32.768 khz v dd = 0 v (v ss1 = battery voltage)
6/16 msm6546/6546l ? semiconductor electrical characteristics (msm6546, 1.5 v, buf = "0") parameter symbol condition min. applied pin typ. max. unit power supply current i dd *1 3 m a oscillation start voltage Cv osc within 2 seconds v ss1 0.9 v output current 1 Ci oh1 v o = C0.5 v 150 port0 to port6*2 sout, sclk m a i ol1 v o = C1.0 v 150 output current 2 Ci oh2 v o = C0.5 v 20 bd m a i ol2 v o = C1.0 v 20 input current 1 i ih1 v i = 0 v, in the input state, with pull-down resistor 7 port0 to port6 *2 15 30 m a input leakage current ? i il ? v i = 0 v, C1.5 v, in the input state, without pull-down resistor port0 to port7*2 sin, sout, sclk 1 m a input current 3 i ih3 v i = 0 v, with pull-down resistor 70 reset test1 to test3 250 500 m a input voltage Cv ih all input pins 0.3 v Cv il 1.2 (v dd = 0 v, v ss1 = C1.5 v (battery voltage) , v ss2 = C3.0 v, v ss3 = C4.5 v, f osc = 32.768 khz, c x = 35 pf, ta = 25c) ? Ci oh3 ? v oh = C0.2 v 4 ? Ci omh3 ? v omh = v ss1 0.2 v 4 output current 3 (common segment output) seg0 to seg53 m a Ci oml3 v oml = v ss2 0.2 v 4 Ci ol3 v ol = C4.3 v 4 *1 depends on program. (values in the above table are applied in the case where the software duty is about 5%.) *2 port0 = p0.0 to p0.3, port1 = p1.0 to p1.3, port2 = p2.0 to p2.3, port3 = p3.0 to p3.3, port4 = p4.0 to p4.3, port5 = p5.0 to p5.3, port6 = p6.0 to p6.3, port7 = p7.0 to p7.3 note: the input of the constant voltage circuit is equal to the output of the voltage converter (v ss2 ).
7/16 msm6546/6546l ? semiconductor absolute maximum ratings (msm6546, 1.5 v, buf = "1") parameter symbol condition rating unit power supply voltage (1) v ss1 ta = 25c C4.0 to +0.3 power supply voltage (2) v ss2 C7.0 to +0.3 v power supply voltage (3) v ss3 C7.0 to +0.3 input voltage v in v ss1 C 0.3 to +0.3 output voltage (1) *1, *2 v o1 v ss1 C 0.3 to +0.3 output voltage (2) *2 v o2 v ss2 C 0.3 to +0.3 output voltage (3) *2 v o3 v ss3 C 0.3 to +0.3 storage temperature t stg C55 to +125 c *1 normal output *2 lcd driver output parameter symbol condition range unit operating voltage v op C1.75 to C0.9 v v operating temperature t op C20 to +70 c oscillation frequency f osc 32.768 khz v dd = 0 v (v ss1 = battery voltage) recommended operating conditions (msm6546, 1.5 v, buf = "1") note: the input of the constant voltage circuit is directly connected to the power supply (v ss1 ). note: the input of the constant voltage circuit is directly connected to the power supply (v ss1 ).
8/16 msm6546/6546l ? semiconductor electrical characteristics (msm6546, 1.5 v, buf = "1") parameter symbol condition min. applied pin typ. max. unit power supply current i dd *1 1.5 m a oscillation start voltage Cv osc within 2 seconds v ss1 0.9 v output current 1 Ci oh1 v o = C0.5 v 150 port0 to port6*2 sout, sclk m a i ol1 v o = C1.0 v 150 output current 2 Ci oh2 v o = C0.5 v 20 bd m a i ol2 v o = C1.0 v 20 input current 1 i ih1 v i = 0 v, in the input state, with pull-down resistor 7 port0 to port6 *2 15 30 m a input leakage current ? i il ? v i = 0 v, C1.5 v, in the input state, without pull-down resistor port0 to port7*2 sin, sout, sclk 1 m a input current 3 i ih3 v i = 0 v, with pull-down resistor 70 reset test1 to test3 250 500 m a input voltage Cv ih all input pins 0.3 v Cv il 1.2 (v dd = 0 v, v ss1 = C1.5 v (battery voltage) , v ss2 = C3.0 v, v ss3 = C4.5 v, f osc = 32.768 khz, c x = 35 pf, ta = 25c) Ci oh3 v oh = C0.2 v 4 ? Ci omh3 ? v omh = v ss1 0.2 v 4 output current 3 (common segment output) seg0 to seg53 m a ? Ci oml3 ? v oml = v ss2 0.2 v 4 Ci ol3 v ol = C4.3 v 4 *1 depends on program. (values in the above table are applied in the case where the software duty is about 5%.) *2 port0 = p0.0 to p0.3, port1 = p1.0 to p1.3, port2 = p2.0 to p2.3, port3 = p3.0 to p3.3, port4 = p4.0 to p4.3, port5 = p5.0 to p5.3, port6 = p6.0 to p6.3, port7 = p7.0 to p7.3 note: the input of the constant voltage circuit is directly connected to the power supply (v ss1 ).
9/16 msm6546/6546l ? semiconductor absolute maximum ratings (msm6546l, 3.0 v, buf = "0") parameter symbol condition rating unit power supply voltage (1) v ss1 ta = 25c C4.0 to +0.3 power supply voltage (2) v ss2 C7.0 to +0.3 v power supply voltage (3) v ss3 C7.0 to +0.3 input voltage v in v ss2 C 0.3 to +0.3 output voltage (1) *2 v o1 v ss1 C 0.3 to +0.3 output voltage (2) *1, *2 v o2 v ss2 C 0.3 to +0.3 output voltage (3) *2 v o3 v ss3 C 0.3 to +0.3 storage temperature t stg C55 to +125 c *1 normal output *2 lcd driver output note: the input of the constant voltage circuit is equal to the output of the voltage converter (v ss1 ). recommended operating conditions (msm6546l, 3.0 v, buf = "0") parameter symbol condition range unit operating voltage v op C3.5 to C1.8 v v operating temperature t op C20 to +70 c oscillation frequency f osc 32.768 khz v dd = 0 v (v ss1 = battery voltage) note: the input of the constant voltage circuit is equal to the output of the voltage converter (v ss1 ).
10/16 msm6546/6546l ? semiconductor electrical characteristics (msm6546l, 3.0 v, buf = "0") parameter symbol condition min. applied pin typ. max. unit power supply current i dd *1 0.75 m a oscillation start voltage Cv osc within 2 seconds v ss2 1.8 v output current 1 Ci oh1 v o = C0.5 v 500 port0 to port6*2 sout, sclk m a i ol1 v o = C2.5 v 500 output current 2 Ci oh2 v o = C0.5 v 20 bd m a i ol2 v o = C2.5 v 20 input current 1 i ih1 v i = 0 v, in the input state, with pull-down resistor 50 port0 to port6 *2 100 200 m a input leakage current ? i il ? v i = 0 v, C3 v, in the input state, without pull-down resistor port0 to port7*2 sin, sout, sclk 1 m a input current 3 i ih3 v i = 0 v, with pull-down resistor 200 reset test1 to test3 750 1500 m a input voltage Cv ih all input pins 0.5 v Cv il 2.5 (v dd = 0 v, v ss1 = C1.5 v, v ss2 = C3.0 v (battery voltage), v ss3 = C4.5 v, f osc = 32.768 khz, c x = 35 pf, ta = 25c) Ci oh3 v oh = C0.2 v 4 ? Ci omh3 ? v omh = v ss1 0.2 v 4 output current 3 (common segment output) seg0 to seg53 m a ? Ci oml3 ? v oml = v ss2 0.2 v 4 Ci ol3 v ol = C4.3 v 4 *1 depends on program. (values in the above table are applied in the case where the software duty is about 5%.) *2 port0 = p0.0 to p0.3, port1 = p1.0 to p1.3, port2 = p2.0 to p2.3, port3 = p3.0 to p3.3, port4 = p4.0 to p4.3, port5 = p5.0 to p5.3, port6 = p6.0 to p6.3, port7 = p7.0 to p7.3 note: the input of the constant voltage circuit is equal to the output of the voltage converter (v ss2 ).
11/16 msm6546/6546l ? semiconductor absolute maximum ratings (msm6546l, 3.0 v, buf = "1") parameter symbol condition rating unit power supply voltage (1) v ss1 ta = 25c C4.0 to +0.3 power supply voltage (2) v ss2 C7.0 to +0.3 v power supply voltage (3) v ss3 C7.0 to +0.3 input voltage v in v ss2 C 0.3 to +0.3 output voltage (1) *2 v o1 v ss1 C 0.3 to +0.3 output voltage (2) *1, *2 v o2 v ss2 C 0.3 to +0.3 output voltage (3) *2 v o3 v ss3 C 0.3 to +0.3 storage temperature t stg C55 to +125 c *1 normal output *2 lcd driver output note: the input of the constant voltage circuit is directly connected to the power supply (v ss2 ). recommended operating conditions (msm6546l, 3.0 v, buf = "1") parameter symbol condition range unit operating voltage v op C3.5 to C0.9 v v operating temperature t op C20 to +70 c oscillation frequency f osc 32.768 khz v dd = 0 v (v ss2 = battery voltage) note: the input of the constant voltage circuit is directly connected to the power supply (v ss2 ).
12/16 msm6546/6546l ? semiconductor electrical characteristics (msm6546l, 3.0 v, buf = "1") parameter symbol condition min. applied pin typ. max. unit power supply current i dd *1 1.5 m a oscillation start voltage Cv osc within 2 seconds v ss2 0.9 v output current 1 Ci oh1 v o = C0.5 v 500 port0 to port6*2 sout, sclk m a i ol1 v o = C2.5 v 500 output current 2 Ci oh2 v o = C0.5 v 20 bd m a i ol2 v o = C2.5 v 20 input current 1 i ih1 v i = 0 v, in the input state, with pull-down resistor 50 port0 to port6 *2 100 200 m a input leakage current ? i il ? v i = 0 v, C3 v, in the input state, without pull-down resistor port0 to port7*2 sin, sout, sclk 1 m a input current 3 i ih3 v i = 0 v, with pull-down resistor 200 reset test1 to test3 750 1500 m a input voltage Cv ih all input pins 0.5 v Cv il 2.5 (v dd = 0 v, v ss1 = C1.5 v, v ss2 = C3.0 v (battery voltage), v ss3 = C4.5 v, f osc = 32.768 khz, c x = 35 pf, ta = 25c) Ci oh3 v oh = C0.2 v 4 ? Ci omh3 ? v omh = v ss1 0.2 v 4 output current 3 (common segment output) seg0 to seg53 m a ? Ci oml3 ? v oml = v ss2 0.2 v 4 Ci ol3 v ol = C4.3 v 4 *1 depends on program. (values in the above table are applied in the case where the software duty is about 5%.) *2 port0 = p0.0 to p0.3, port1 = p1.0 to p1.3, port2 = p2.0 to p2.3, port3 = p3.0 to p3.3, port4 = p4.0 to p4.3, port5 = p5.0 to p5.3, port6 = p6.0 to p6.3, port7 = p7.0 to p7.3 note: the input of the constant voltage circuit is directly connected to the power supply (v ss2 ).
13/16 msm6546/6546l ? semiconductor notes on use power supply for 0.9 v microcontroller series (backup flag and constant-voltage circuit) the 0.9 v microcontroller devices have a built-in constant-voltage circuit. the output of this constant-voltage circuit powers the microcontroller's internal logic circuits. setting a backup flag (buf) allows the input of the constant-voltage circuit to be switched to either the battery or the output generated in the voltage converter, based on the battery voltage. a battery voltage of 1.5 v or 3.0 v can be selected. the output (v ee ) of the constant-voltage circuit is set at approximately C1.3 v. this allows the current consumed by the internal logic to be limited, irrespective of the battery voltage. however, if the input of the constant voltage circuit is below this set value (approximately C1.3 v), the output (v ee ) is equal to the input. the 0.9 v microcontroller can be operated even if the internal voltage (output from the constant voltage circuit) falls to 0.9 v. setting the backup flag allows a larger operating voltage margin despite changes in internal voltage due to noise. for example, for the 1.5 v specification, setting the backup flag to "0" causes twice the battery voltage to enter the constant-voltage circuit. thus, even if the battery voltage falls to 0.9 v, the output voltage (v ee ) is maintained at C1.3 v to allow a larger margin of operating voltage for the internal logic circuits, because 1.8 v is applied to the input of the constant-voltage circuit. figures 1 to 4 show the internal status depending on the backup flag settings for the battery, as well as status features. xtal v dd (0 v) v ss1 (C1.5 v) v ss2 (C3.0 v) v ss3 * (C4.5 v) v ee (about C1.3 v) lcd driver* voltage converter backup flag (buf) constant voltage circuit vr internal logic xt xtb *the v ss3 pin is provided for the devices that contain an lcd driver.
14/16 msm6546/6546l ? semiconductor (figure 1) 1.5 v operation (backup flag = "1") (figure 2) 1.5 v operation (backup flag = "0") (figure 3) 3.0 v operation (backup flag = "1") voltage converter vr internal logic v dd = 0 v v b = C3.0 v (C1.5 v) v ee v dd v ss1 v ss2 voltage doubler internal status operating range current consumption feature the battery level v ss2 is applied to the input of the constant voltage circuit. C0.9 to C3.5 v 1.5 m a* when the battery level is powered down, the internal circuit is powered directly by the battery. * when the software dut y is about 5% voltage converter vr internal logic v dd = 0 v v b = C1.5 v (C3.0 v) v ee v dd v ss1 v ss2 voltage doubler internal status operating range current consumption feature the battery level v ss1 is applied to the input of the constant voltage circuit. C0.9 to C1.75 v 1.5 m a* when the battery level is powered down, the internal circuit is powered directly by the battery. * when the software dut y is about 5% voltage converter vr internal logic v dd = 0 v v b = C1.5 v (C3.0 v) v ee v dd v ss1 v ss2 voltage doubler internal status operating range current consumption feature a doubled level of v ss2 is applied to the input of the constant voltage circuit. C0.9 to C1.75 v 3 m a* when the battery level is powered down, a larger operating voltage margin is gained, compared to the case of figure 1. * when the software dut y is about 5%
15/16 msm6546/6546l ? semiconductor (figure 4) 3.0 v operation (backup flag = "0") voltage converter vr internal logic v dd = 0 v v b = C3.0 v (C1.5 v) v ee v dd v ss1 v ss2 voltage rise internal status operating range current consumption feature a doubled level of v ss1 is applied to the input of the constant voltage circuit. C1.8 to C3.5 v 0.75 m a* when the battery level is powered down, a smaller operating voltage margin is gained, compared to the case of figure 3. * when the software dut y is about 5%
16/16 msm6546/6546l ? semiconductor (unit : mm) notes for mounting the surface mount type package the sop, qfp, tsop, soj, qfj (plcc), shp and bga are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed in storage. therefore, before you perform reflow mounting, contact okis responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). qfp100-p-1420-0.65-bk package material lead frame material pin treatment solder plate thickness package weight (g) epoxy resin 42 alloy solder plating 5 m m or more 1.29 typ. mirror finish package dimensions

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