BU24591 optical ics 1/7 4bit 1chip micro-controller for cd-da BU24591 the BU24591 is a 4bit 1chip micro-controller for cd-da that integrates multiple i/o, such as 8bit 8-channel ad converter, pulse width counter, two lines of sio, and lcd controller driver with 80 segment (max.). all lcd segment can be switched into cmos output by the program. these i/o achieves multi-function with few pins. ! ! ! ! applications portable cd-da, cd radio cassette player ! ! ! ! features 1) low voltage, high-speed operation (v dd =2.3 to 3.6v at 4.4mhz) 2) built-in 8bit 8-channel ad converter 3) built-in pulse width counter 4) built-in two lines of sio 5) built-in lcd controller driver with 20 segments, 4 common (with 3 common available) 6) all segment output of lcd controller driver can be switched into cmos output by the program. ! ! ! ! absolute maximum ratings (ta=25 c) parameter symbol limits unit v power dissipation pd mw operating temperature range topr c storage temperature range tstg c ? 25 to + 75 ? 55 to + 125 ? 0.3 to + 4.5 v dd applied voltage 500 ? ? reduced by 5mw for each increase in ta of 1 c over 25 c. ! ! ! ! recommended operating conditions (ta=25 c) parameter symbol min. typ. max. unit power supply voltage v dd 2.3 ? 3.6 v input "h" voltage v ihs 0.75v dd ? v dd v input "l" voltage v ils 0 ? 0.15v dd v
BU24591 optical ics 2/7 ! ! ! ! block diagram pwc01a tmr03b stp04a bix03a adc83a 8ch-8bit / digital-in lcd07a common gen. bias gen. disp. segment driver pwc t0,t1 w0 w3 bin p00 p03 p10 p13 p20 p23 sck0 sck1 sio1 sin1 adc0 7 com0 3 seg00 03 seg04 07 seg08 11 seg12 15 seg16 19 irq irq irq stp irq stp irq irq y x acc flag flag stk alu l h e e stk instruction decoder interrupt control rom 16384 8 bit dph dpl pc stack 8 pc inc test 512 4 bit reset reset clock gen osc03a cpu02a osc1 osc2 stp system clk u-bus l-bus irq ram pio11a pio11a sio04b sio04b pio11a sio0 sin0 ? prom in not contained. ? the number of bits of alu is 4. ? address bus and data bus do not go out. (external memory cannot be addressed.)
BU24591 optical ics 3/7 ! ! ! ! pin assignment 32 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 49 64 50 51 52 53 54 55 56 57 58 59 60 61 62 63 48 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 BU24591 osc1 osc2 vdd adc0 adc1 adc2 adc3 adc4 adc5 adc6 adc7 test com0 com1 com2 com3 gnd reset w3 w2 w1 w0 bin sck1 sio1 sin1 p23 p22 p21 p20 t1 t0 pwc p13 p12 p11 p10 p03 p02 p01 p00 sck0 sio0 sin0 seg19 seg18 seg17 seg16 seg00 seg01 seg02 seg03 seg04 seg05 seg06 seg07 seg08 seg09 seg10 seg11 seg12 seg13 seg14 seg15 ! ! ! ! pin descriptions pin no. i / o function type p00 to p03 p10 to p13 p20 to p23 (pi011a block ) 24 to 27 28 to 31 35 to 38 i / o ? 4-bit input or output. ? pull-up resistor can be turned on/off in a bit by program. ? input/output is specified in a bit by program. (output is nch open drain type.) d w0 to w3 (stp04a block ) 43 to 46 i ? general 4-bit input. ? it can be used as stop cancellation input and interrupt request signal input by program. (it can be specified in a bit) ? pull-up resistor can be turned on/off in a bit by program. ? upon resetting, the pull-up resistor is turned off. c bin (bix03a block ) 42 i ? general 1-bit input. ? it can be used as stop cancellation input and interrupt request signal input by program. ? pull-up resistor can be turned on/off by program. ? upon resetting, the pull-up resistor is turned off. c ? 1 immediately after resetting, terminal is in high impedance state. therefore, termination may be required in some application s. ? upon resetting, input is specified, and the pull-up resistance is turned off. ? 1 pin name
BU24591 optical ics 4/7 i / o type i ? 8-bit serial data input. a i / o ? 8-bit serial data i/o. ? i/o is switched by program. e i / o ? clock i/o for sending/receiving serial data. ? any of three type of internal clock and one external clock is switched by program. e i ? analog data input. ? digital data input can be specified in a bit by program. ? upon resetting, analog input is specified. g o ? lcd segment output or cmos output can be switched in 4 ports by program. ? upon resetting, cmos output is specified and polarity is "l". f o ? lcd common output. f i ? pulse input. a i ? it can be used as 1-bit input. a i h o ? oscillation circuit output. h i ? test input. (this is a terminal for testing and it contains the pull-down resistor. use it in the open state usually.) b i ? reset input. (cpu is reset by setting this terminal to "l".) a ? ? power supply ? ? ? ground ? ? oscillation circuit input. ? upon selecting 1/3 duty, com3 outputs gnd level. ? external count clock input. ? external clock input. function 21, 39 22, 40 23, 41 52 to 59 1 to 4 5 to 8 9 to 12 13 to 16 17 to 20 61 to 64 32 33, 34 49 50 60 47 51 48 pin no. sin0, sin1 sio0, sio1 sck0, sck1 adc0 to adc7 (adc83a block ) seg00 to 03 seg04 to 07 seg08 to 11 seg12 to 15 seg16 to 19 com0 to com3 (lcd07a block ) pwc (pwc01a block ) t0, t1 (tmr03b block ) osc1 test reset v dd gnd (sio04b block ) osc2 ( osc03a block ) pin name
BU24591 optical ics 5/7 ! ! ! ! input output circuit type a ? hysteresis input ? hysteresis input with pull-down resistance. type b type c ? hysteresis input with pull-up resistance which can be turned on/off by program. type d ? hysteresis input with pull-up resistance or nch open drain output, which can be controlled by program. type e ? hysteresis input or cmos output, which can be controlled by program. type f ? lcd driver output. only seg can be switched into cmos output. ? analog input or hysteresis input, which can be controlled by program. type g fig.1 type h ? input and output of oscillation circuit with stop control. ? all digital inputs are cmos gate input.
BU24591 optical ics 6/7 ! ! ! ! electrical characteristics (unless otherwise noted, ta = 25 c, v dd =3v) parameter symbol min. typ. max. unit conditions p00 to p03, p10 to p13, p20 to p23, t0, t1, adc0 to adc7 w0 to w3, bin, sin0, sin1, sio0, sio1, 2.25 ?? ? hysteresis input p00 to p03, p10 to p13, p20 to p23, t0, t1, adc0 to adc7 ?? 0.5 w0 to w3, bin, sin0, sin1, sio0, sio1, ? hysteresis input p00 to p03, p10 to p13, p20 to p23, w0 to w3, bin, sin0, sin1, sio0 ?? 1 ? without pull-down resistance ? v in =v dd test 120 230 410 ? pull-down resistance included ? v in =v dd p00 to p03, p10 to p13, p20 to p23, w0 to w3, bin, sin0, sin1, sio0, ??? 1 ? w, bin turned off pull-up resistance ? sio, sck for input ? v in =gnd p00 to p03, p10 to p13, p20 to p23, w0 to w3, bin ? 35 ? 82 ? 150 ? turned on pull-up resistance seg00 to seg19, 2.4 ?? osc2 osc2 com0 to com3 2.5 ?? p00 to p03, p10 to p13, ?? 0.4 ? seg, com for lcd driver output ? i ol =1.6ma seg00 to seg19, com0 to com3 ? ? 0.4 ? i ol =1.0ma output leak current p00 to p03, p10 to p13, ?? 1 adc0 to adc7, pwc, t0 sio1, sck0, sck1, sio1, sck0, sck1, adc0 to adc7, pwc, t0 input "h" voltage 1 input "l" voltage 1 input "h" current 1 input "h" current 2 input "l" current 1 input "l" current 2 output "h" voltage 1 output "h" voltage 2 output "l" voltage 1 output "l" voltage 2 ? seg, com for lcd driver output ? i oh = ? 500 a ? i oh = ? 1.0ma t1, reset, osc1 t1, reset, test, osc1 sio0, sio1, sck0, sck1 ? v in =gnd sck0, sck1 p20 to p23, sio0, sio1, p20 to p23 reset, test sck0, sck1, pwc, reset,test sck0, sck1, pwc, ? p, sio, sck for input. ? p, sio, sck for input. ? p, sio, sck for input. ? p for input turned off pull-up resistance ? sio, sck for output ? p, sio, sck for output ? p for hi-z output ? adc for digital input. ? adc for digital input. pin a/d conversion resolution adc0 to adc7 ? 8 ? a/d conversion setting time adc0 to adc7 ? 25 ? mc : machine cycle ? 1 ? 2 a/d conversion linearity error adc0 to adc7 ?? 3 lcd 2/3 level output voltage com0 to com3 seg00 to seg19 ? 2 ? lcd 1/3 level output voltage v ih1 v il1 i ih1 i ih2 i il1 i il2 v oh1 v oh2 v ol1 v ol2 i l res t s e l v 1 v 2 com0 to com3 seg00 to seg19 ? 1 ? stop current ?? 1 ? stop mode i ddst a operation current ? 1.4 ? ? f osc =4.4mhz i ddop ma v osc1 2.4 ?? ? external clock input "h" voltage 2 v ih2 v v osc1 ?? 0.5 ? external clock input "l" voltage 2 v il2 v a a a a v v v v a clock frequency osc1, osc2 2 ? 4.4 f osc mhz bits mc lsb v v ? 1 1 machine cycle is 1/6 of 1 clock cycle. ? 2 value of linearity error when bypass-capacitor is set on adc terminal.
BU24591 optical ics 7/7 ! ! ! ! circuit operation (1) single power supply operation (v dd =2.3v to 3.6v) (2) memory size program memory rom 16384 8 bits general purpose ram 512 4 bits ram for lcd 20 4 bits (3) instruction execution time. (one-cycle instruction) 1.5 sec (at 4mhz) (4) subroutine nesting: 8 levels (5) interrupts: 6 external: 3 internal: 3 (timer/counter, serial i/o) (6) rom data table function (data table area 16kbytes) (7) power saving mode. (8) 20-segment lcd built-in driver available for many kinds of displays. bias: 1/3 duty: 1/3, 1/4 (programmable) built-in bias resistance (approximately 50k ? 3 stages) (9) lcd segment output can be switched into cmos output by program. 20 segments can be switched in 4 ports. upon resetting, cmos output is specified and polarity is ?l?. (10) remote-control receiver circuit is included. (pulse width measuring instrument) (11) 8-channel 8-bit a/d converter is included. (12) each of a/d inputs can be used as digital input by program. (13) built-in 8-bit timer counter (als used for event counter). (14) built-in two systems of serial i/o that can interface with any external lsi. (lsb first) (15) 12 i/o ports that can pull up by program. (16) 5 input port that can pull up by program. ! ! ! ! external dimensions (units : mm) qfp-a64 0.15 0.1 48 33 32 17 49 64 1 16 14.0 0.2 16.4 0.3 14.0 0.2 0.35 0.1 0.05 0.5 16.4 0.3 0.8 2.7 0.1 0.15
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