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dear customers, about the change in the name such as "oki electric industry co. ltd." and "oki" in documents to oki semiconductor co., ltd. the semiconductor business of oki electric industry co., ltd. was succeeded to oki semiconductor co., ltd. on oc tober 1, 2008. therefore, please accept that although the terms and marks of "oki electric indust ry co., ltd.", ?oki electric?, and "oki" remain in the documents, they all have been changed to "oki semiconductor co., ltd.". it is a change of the company name, the co mpany trademark, and the logo, etc. , and not a content change in documents. october 1, 2008 oki semiconductor co., ltd. 550-1 higashiasakawa-cho, hachio ji-shi, tokyo 193-8550, japan http://www.okisemi.com/en/
? semiconductor msc1951-01 1/17 ? semiconductor msc1951-01 7-segment 16-digit or 16-segment 6-bargraph display controller/driver general description msc1951-01 is a bi-cmos bargraph and alphanumeric display controller designed to interface with either vacuum fluorescent display. msc1951-01 can drive displays with up to 16 figures with either 16 segment bargraph or seven- segment type code plus a decimal point and comma tail. msc1951-01 adopts a serial interface system, which allows data transfer from the microcomputer only by two signal lines of sclk and data. features ? can display up to 16 digits of 7-segment type character with comma/point or of 16-segment type bargraph. ? the number of display digits is programmable within 16. ? the brightness adjustment is programmable by 1/32 step. ? the display contents can be changed at any digit. ? buit-in pla can display alphanumeric characters, e.g., 0 to 9 a, c, e, f, p, l (capital letters), b, and d (small letters). in addition, 16-segment dot display and bar display are allowed. ? instruction is executed by one byte. ? driver output current : C20 ma max. (digit) C10 ma (segment), plastic dip C 0 5 ma (segment), plastic qfp withstand voltage : 58 v max. ? can be used for led. ? pin compatible with 10951 manufactured by rockwell. ? power supply voltage : 5v 10% ? package options: 40-pin plastic dip (dip40-p-600-2.54) (product name : msc1951-01rs) 44-pin plastic qfp (qfp44-p-910-0.80-k) (product name : mSC1951-01GS-K) e2c0027-27-y2 this version: nov. 1997 previous version: jul. 1996
? semiconductor msc1951-01 2/17 block diagram sga sgb sgc sgd sge sgf sgg sgh sgi sgj sgk sgl sgm sgn sgo sgp pnt tail ad16 ad15 ad14 ad13 ad12 ad11 ad10 ad 9 ad 8 ad 7 ad 6 ad 5 ad 4 ad 3 ad 2 ad 1 data sclk por v ss v dd a segment drivers (anode) segment decoder 64 16 pla 6 16 display data buffer timing and control 2 16 decimal pt. comma tail digit drivers (grid)
? semiconductor msc1951-01 3/17 input and output configuration ? schematic diagrams of logic portion input circuit ? schematic diagrams of logic portion output circuit ? schematic diagrams of driver output circuit v dd v ss v dd input v ss v dd v ss v dd output v ss output v ss v ss
? semiconductor msc1951-01 4/17 pin configuration (top view) pin no. function 1 power supply (5v) 2 digit output pin 16 ~~ 17 digit output pin 1 18 gnd 19 test pin 20 power-on-reset pin 21 data input pin 22 shift clock pin 23 segment output pin a ~ ~ 38 segment output pin p 39 tail output pin 40 point output pin pnt tail sgp sgo sgn sgm sgl sgk sgj sgi sgh sgg sgf sge sgd sgc sgb sga sclk data 140 239 3 38 4 37 536 635 7 34 833 932 10 31 11 30 12 29 13 28 14 27 15 26 16 25 17 24 18 23 19 22 20 21 v ss ad16 ad15 ad14 ad13 ad12 ad11 ad10 ad 9 ad 8 ad 7 ad 6 ad 5 ad 4 ad 3 ad 2 ad 1 v dd (gnd) a por 40-pin plastic dip
? semiconductor msc1951-01 5/17 11 10 9 8 7 6 5 4 3 2 1 23 24 25 26 27 28 29 30 31 32 33 sgc sgd sge sgf sgg sg h sg i sgj sgk sgl sgm ad 3 ad 4 ad 5 ad 6 ad 7 ad 8 ad 9 ad10 ad11 ad12 nc nc sgb sga sclk data v dd (gnd) por a v dd (gnd) ad 1 ad 2 22 21 20 19 18 17 16 15 14 13 12 sgn sgo sgp tail pnt v dd (gnd) v ss ad16 ad15 ad14 ad13 34 35 36 37 38 39 40 41 42 43 44 nc : no-connection pin 44-pin plastic qfp pin function 1 no-connection pin 2 digit output pin 12 ~ 13 digit output pin 1 14 gnd 15 test pin 16 power-on-reset pin 17 gnd 18 data input pin 19 shift clock pin ~ 21 segment output pin b 20 segment output pin a pin function 22 no-connection pin 23 segment output pin c ~ 36 segment output pin p 37 tail output pin 38 point output pin 39 gnd 40 power supply (5v) 41 digit output pin 16 ~ 44 digit output pin 13 ~ ~
? semiconductor msc1951-01 6/17 pin descriptions symbol type description power supply pin v ss gnd pin v dd serial data input of display data/control data input from msb data i shift clock signal input of shift register shifts data at the falling edge of sclk sclk i power-on-reset input. input of "h" level into this pin with the power turned on initializes this ic. the internal state after the initialization is as follows: 1) ad1 to ad16, sga to sgp, tail and pnt output are in the off state. 2) the duty cycle is set to "0". 3) the digit counter value is set to 16 digits. 4) the buffer pointer is set to ad1. 5) pin "a" is in the output mode. por i usually used as an output mode, and outputs 1/5 of the internal oscillation frequency. in the test mode, operates as an input pin. a i/o grid output pin the output configuration is an emitter follower. ad16 to ad1 o segment output pin the output configuration is an emitter follower. sga to sgp tail, pnt o
? semiconductor msc1951-01 7/17 absolute maximum ratings parameter symbol output voltage output current power supply voltage input voltage v ma v v ma rating unit v ss C 58 to v ss + 0.3 C25 C0.3 to +6.5 C0.3 to v ss + 0.3 C20 v ss i load v ss v in digit segment storage temperature c C55 to 150 t stg dip qfp C10 ma recommended operating conditions parameter symbol low level input voltage power supply voltage high level input voltage v v v condition unit all inputs v il v ss v ih operating temperature c t op clock frequency osc frequency frame frequency f c f osc f fr all inputs 1.0 5.5 5.5 max. 85 typ. 0.0 4.5 3.6 min. C40 khz khz hz 195 500 500
? semiconductor msc1951-01 8/17 electrical characteristics dc characteristics ac characteristics parameter symbol high level input current low level input current high level input voltage low level input voltage v m a condition unit all inputs v ss = 5 v i load = C10 ma i ih i il v ih v il v oh1 v v ss = 5 v i load = C10 ma i ss (v ss = 5 v10%, v gg = C53 v0.5 v, ta = C40 to +85c) 2.0 2.0 5.5 1.0 max. C2.0 C2.0 3.6 0.0 3.0 min. 2.5 ma no load i out 10.0 current consumption high level output voltage v v v v oh2 low level output voltage v m a all inputs v ih = v ss v il = 0.0 v digit segment v ss = 5 v i load = C5ma dip qfp 2.5 v ol output leakage current 10.0 v gg +3.0 m a "l" output current is determined by external pull-down resistor v out = v ss C v gg = C53 v frame frequency self-oscillation frequency m s m s khz f fr f c f osc sclk "h" time t cw-h 332 500 548 88 392 1.0 data set-up time ns t cw-l 1.0 when unit mounted clock frequency sclk "l" time data hold time v ss rise time por pulse width por-sclk time internal processing time t ds t dh t prz t resw t ress t busy m s m s m s ns ns hz khz 200 100 100 200 200 40 parameter symbol condition unit (v ss = 5 v10%, v gg = C53 v0.5 v, ta = C40 to +85c) max. min.
? semiconductor msc1951-01 9/17 timing diagam a) sclk and data timing b) v ss input and data word transfer timing sclk data C3.6 v C1.0 v C3.6 v C1.0 v t cw-h t cw-l t ds t dh f c t busy v ss por sclk t prz t resw t ress msb side data word t busy lsb side msb side lsb side C4.5 v C0 v data word
? semiconductor msc1951-01 10/17 functional description the msb value of 8-bit serial data determines whether the input data into msc1951-01 is control data or display data. display data by setting msb = "0", the display data can be entered. the address of pla and set values are specified by bit 5 to bit 0 following msb. tables 1 to 3 provide the pla code table. command display data description set display contents msb bit7 bit6 bit5 bit4 bit3 bit2 bit1 lsb bit0 0x2 5 2 4 2 3 2 2 2 1 2 0 x : don't care a) buffer pointer control this command changes the display contents only at an arbitrary digit. (the ram write address is set.) to input data into bits 0 to 3, set (desired digit C2). (example) when specifying ad4, the set value is 2 (0010). specified digit set value of bits 0 to 3 specified digit set value of bits 0 to 3 ad1 ad2 ad3 ad4 ad5 ad6 ad7 ad8 15 (1111) 0 (0000) 1 (0001) 2 (0010) 3 (0011) 4 (0100) 5 (0101) 6 (0110) ad9 ad10 ad11 ad12 ad13 ad14 ad15 ad16 7 (0111) 8 (1000) 9 (1001) 10 (1010) 11 (1011) 12 (1100) 13 (1101) 14 (1110) control data the control data can be input by setting msb to "1". in addition, a command type and set values are determined by the bit 6 to bit 0 following msb. command function msb bit 7 lsb bit 0 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 buffer pointer control specifies the ram address. 12 0 0102 3 2 2 2 1 digit counter control sets the number of display digits. 12 0 1002 3 2 2 2 1 duty cycle control sets the duty value. 12 0 112 4 2 3 2 2 2 1 test mode sets the test mode. 1x 002 4 xxx x: don't care
? semiconductor msc1951-01 11/17 b) digit counter control this command sets the number of display digits. set the desired number of digits in bits 0 to 3. c) duty cycle control this command sets the duty cycle of the driver output. this command allows the brightness to be adjusted by 1/32 step. as shown in figure 1, the blank time between digits or between the segments is specified by 1 bit time on the hardware. therefore, the set value ranges from 0 to 31. note: at the time of duty cycle = 31 (i bit time = 5 1/fosc) fig. 1 output timing number of display digits set value of bits 0 to 3 number of display digits set value of bits 0 to 3 1 2 3 4 5 6 7 8 1 (0001) 2 (0010) 3 (0011) 4 (0100) 5 (0101) 6 (0110) 7 (0111) 8 (1000) 9 10 11 12 13 14 15 16 9 (1001) 10 (1010) 11 (1011) 12 (1100) 13 (1101) 14 (1110) 15 (1111) 0 (0000) ad1 ad2 ad3 ad4 ad5 ad6 ad7 ad8 ad9 ad10 ad11 ad12 ad13 ad14 ad15 ad16 sgn 1 display cycle 512 bit times 31bit times 1 bit time 31bit times 1 bit time v ss v gg v ss v gg
? semiconductor msc1951-01 12/17 d) test mode this mode is not a user function, but is used for outgoing inspection. table 1 pla code table 7 6543210 input code sga sgb sgc sgd sge sgf sgg sgh sgi sgj sgk sgl sgm sgn sgo sgp 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x x x x x x x x x x x x x x x x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 segment a on segment b on segment c on segment d on segment e on segment f on segment g on segment h on segment i on segment j on segment k on segment l on segment m on segment n on segment o on segment p on 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 pnt tail 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x x x x x x x x x x x x x x x x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 segment a on segment a & b on segment a-c on segment a-d on segment a-e on segment a-f on segment a-g on segment a-h on segment a-i on segment a-j on segment a-k on segment a-l on segment a-m on segment a-n on segment a-o on segment a-p on 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 11 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x x x x x x x x x x x x x x x x 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 number 0 number 1 number 2 number 3 number 4 number 5 number 6 number 7 number 8 number 9 letter p letter l comma blank decimal blank 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x x x x x x x x x x x x x x x x 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 number 0 number 1 number 2 number 3 number 4 number 5 number 6 number 7 number 8 number 9 letter a letter b letter c letter d letter e letter f 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 function alphanumeric and special codes 1 to 16 segments bargraph codes any 1 of 16 segments segment driver output patterns (1 = on)
? semiconductor msc1951-01 13/17 table 2 pla code (at the time of 7-segment display) sgp sgo sgn sgm sgl sgk sgj sgi sgh sgg sgf sge sgd sgc sgb sga sga sgg sgf sgb sge sgc sgd 16-segment bargraph 7-segment alphanumeric pnt tail 00 01 02 03 04 05 06 07 08 10 18 20 28 30 38 09 11 19 21 29 31 39 0a 12 1a 22 2a 32 3a 0b 13 1b 23 2b 33 3b 0c 14 1c 24 2c 34 3c 0d 15 1d 25 2d 35 3d 0e 16 1e 26 2e 36 3e 0f 17 1f 27 2f 37 3f ; ?
? semiconductor msc1951-01 14/17 table 3 pla code (at the time of bar display) see figure 2 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f see figure 2 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f 0123456789abcdef 0123456789pl * ?? 7-segment characters special bargraph codes 7-segment characters special bargraph codes = pnt and tail both set = pnt only set ?? ? 7-segment characters special bargraph codes 7-segment characters special bargraph codes sgp sgo sgn sgm sgl sgk sgj sgi sgh sgg sgf sge sgd sgc sgb sga sgp sgo sgn sgm sgl sgk sgj sgi sgh sgg sgf sge sgd sgc sgb sga sgp sgo sgn sgm sgl sgk sgj sgi sgh sgg sgf sge sgd sgc sgb sga sgp sgo sgn sgm sgl sgk sgj sgi sgh sgg sgf sge sgd sgc sgb sga
? semiconductor msc1951-01 15/17 * to set the comma and point, the display data at the display digit is input, then 2c and 2e data are input. note: only when 2c and 2e data are entered, the write address in the ram is not automatically incremented. for other data, the address specified by the buffer pointer control command is automatically incremented by one each time the display data is input. application circuit +5v 10 m f r c Cv gg e k typical grid (digit) driver circuit r g typical anode (segment) driver circuit vacuum fluorescent display 16 16 r a v dd adn sgn por msc1951-01 v ss data sclk host system data clock
? semiconductor msc1951-01 16/17 (unit : mm) package dimensions 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). dip40-p-600-2.54 package material lead frame material pin treatment solder plate thickness package weight (g) epoxy resin 42 alloy solder plating 5 m m or more 6.10 typ.
? semiconductor msc1951-01 17/17 (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). qfp44-p-910-0.80-k package material lead frame material pin treatment solder plate thickness package weight (g) epoxy resin 42 alloy solder plating 5 m m or more 0.35 typ. mirror finish

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