Samsung S6B0717X01-B0CY, S6B0717X01-B0CZ, S6B0717X01-xxX0, S6B0717X01-xxXN Datasheet

of this document may be reproduced or
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permission of LCD Driver IC Team.

S6B0717

55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD

January.2000

Ver. 1.0

Prepared by: Yong-Jin, Jeon

[e-mail]

Contents in this document are subject to change without notice. No part

55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD S6B0717

S6B0717 Specification Revision History

Version Content Date

0.0 Apr.1999

1.0

Change VDD Range : 2.4V to 5.5V → 2.4V to 3.6V

Jan.2000

2

S6B0717 55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD

CO

NTENTS

INTRODUCTION.................................................................................................................................................. 1

FEATURES ......................................................................................................................................................... 1

BLOCK DIAGRAM.............................................................................................................................................. 3

PAD CONFIGURATION....................................................................................................................................... 4

PAD CENTER COORDINATES........................................................................................................................... 5

PIN DESCRIPTION.............................................................................................................................................. 7

POWER SUPPLY......................................................................................................................................... 7

LCD DRIVER SUPPLY................................................................................................................................. 7

SYSTEM CONTROL .................................................................................................................................... 8

MICROPROCESSOR INTERFACE .............................................................................................................10

LCD DRIVER OUTPUTS.............................................................................................................................12

FUNCTIONAL DESCRIPTION............................................................................................................................13

MICROPROCESSOR INTERFACE .............................................................................................................13

DISPLAY DATA RAM (DDRAM)..................................................................................................................17

LCD DISPLAY CIRCUITS ............................................................................................................................20

LCD DRIVER CIRCUIT................................................................................................................................22

POWER SUPPLY CIRCUITS.......................................................................................................................23

REFERECE CIRCUIT EXAMPLES..............................................................................................................30

RESET CIRCUIT.........................................................................................................................................32

INSTRUCTION DESCRIPTION...........................................................................................................................33

SPECIFICATIONS..............................................................................................................................................47

ABSOLUTE MAXIMUM RATINGS...............................................................................................................47

DC CHARACTERISTICS.............................................................................................................................48

REFERENCE DATA....................................................................................................................................51

AC CHARACTERISTICS.............................................................................................................................53

REFERENCE APPLICATIONS...........................................................................................................................57

MICROPROCESSOR INTERFACE .............................................................................................................57

CONNECTIONS BETWEEN S6B0717 AND LCD PANEL............................................................................58

3

S6B0717 55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD

INTRODUCTION

The S6B0717 is a driver & controller LSI for graphic dot-matrix liquid crystal display systems. It contains 55 common
and 100 segment driver circuits. This chip is connected directly to a microprocessor, accepts serial or 8-bit parallel
display data and stores in an on-chip display data RAM of 65 x 100 bits. It provides a high-flexible display section
due to 1-to-1 correspondence between on-chip display data RAM bits and LCD panel pixels. And it performs display
data RAM read/write operation with no external operating clock to minimize power consumption. In addition,
because it contains power supply circuits necessary to drive liquid crystal, it is possible to make a display system
with the fewest components.

FEATURES

Driver Output Circuits

− 55 common outputs / 100 segment outputs
On-chip Display Data RAM

− Capacity: 65 x 100 = 6,500 bits

− Bit data "1": a dot of display is illuminated.

− Bit data "0": a dot of display is not illuminated.

Multi-chip Operation (Master, Slave) Available
Applicable Duty Ratios

Duty ratio Applicable LCD bias Maximum display area

1/55 1/8 or 1/6
1/34 1/6 or 1/5

Microprocessor Interface

− 8-bit parallel bi-directional interface with 6800-series or 8080-series

− Serial interface (only write operation) available

On-Chip Low Power Analog Circuit

− On-chip oscillator circuit

− Voltage converter (x2, x3, x4, x5)

− Voltage regulator (temperature coefficient: -0.05%/°C or external input)

− Voltage follower (LCD bias: 1/5, 1/6 or 1/8)

− Electronic contrast control function (64 steps)

Operating Voltage Range

− Supply voltage (VDD): 2.4 to 3.6 V

− LCD driving voltage (VLCD = V0 - VSS): 4.0 to 15.0 V

Wide Operating Temperature Range

− Ta = -40°C to 85 °C

Low Power Consumption

55 × 100
34 × 100

− 100 µΑ Max. (VDD = 3V, x4 boosting, V0 = 11V, internal power supply ON)

− 10 µΑ Max. (during power save [standby] mode)

Package Type

− Gold bumped chip or TCP

1

55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD S6B0717

Series Specifications

Product code Temp. coefficient

S6B0717X01-B0CZ
S6B0717X01-B0CY

-0.05% / °C

S6B0717X01-xxX0 670 µm

S6B0717X01-xxXN

Package Chip thickness

670 µm

COG

470 µm

TCP

470 µm

* xx: TCP ordering number

2

S6B0717 55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD

DB0

DB1

COMS

COM53

BLOCK DIAGRAM

SEG99

SEG98

SEG66

SEG65

VDD

V0
V1
V2
V3
V4

VSS

SEG64

SEG1

SEG0

:

100 SEGMENT

DRIVER CIRCUITS

:

COMS

COM0

:

:

56 COMMON

DRIVER CIRCUITS

HPMB

V0

VR

INTRS

VEXT

REF

VOUT

C1-

C1+

C2-

C2+

C3-

C3+

DCDC5B

V / F

CIRCUIT

V / R

CIRCUIT

V / C

CIRCUIT

PAGE

ADDRESS

CIRCUIT

SEGMENT CONTROLLER

I/O

BUFFER

DISPLAY DATA RAM
65 X 100 = 6,500 Bits

COLUMN ADDRESS

CIRCUIT

STATUS REGISTER INSTRUCTION REGISTER

COMMON CONTROLLER

LINE

ADDRESS

CIRCUIT

INSTRUCTION DECODERBUS HOLDER

DISPLAY

TIMING

GENERATOR

CIRCUIT

OSCILLATOR

MS
CL
M
FRS
DISP
DUTY

CLS

TEMPS

MPU INTERFACE (PARALLEL & SERIAL)

DB2

DB3

DB4

DB5

DB6(SCLK)

DB7(SID)

C68

RESETB

PS

RW_WR

E_RD

RS

CS2

CS1B

Figure 1. Block Diagram

3

55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD S6B0717

117

228

116

22987258

86

1

ðððð

- - - -

ðððð

ðððð

- - - -

ðððð

(-3855, -500)

(+3815, -548)

30

µ

m

30

µ

m

30

µ

m

60

µ

m

30

µ

m

42

µ

m

108

µ

m

42

µ

m

108

µ

m

(-4170, +1065)

(+4170, +1065)

PAD CONFIGURATION

ррр ррррррррррррррррррр

- - - - - - - - - -

Y

S6B0717

(TOP VIEW)

рррррррррррррррррррррр

Figure 2. S6B0717 Chip Configuration

Table 1. S6B0717 Pad Dimensions

Item Pad No.

Chip size - 9000 2350
Pad pitch

Bumped pad size

(0,0)

- - - - - - - - - -

1 to 86 90

87 to 258 70

1 to 86 56 114

87 to 116 108 50
117 to 228 50 108
229 to 258 108 50

ррррррррррррррррррр

X

ððð

ррррррррррррррррррррррр

Size

X Y

Unit

µm

Bumped pad height 1 to 258 17 (Typ.)

COG Align Key Coordinate ILB Align Key Coordinate

30µm 30µm 30µm

30µm 30µm 30µm

42µm 108µm

42µm108µm

4

S6B0717 55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD

PAD CENTER COORDINATES

Table 2. Pad Center Coordinates

[Unit: µm]

No. Name X Y No. Name X Y No. Name X Y

1 DUMMY -3825 -1051 51 C3- 675 -1051 101 COM13 4341 -35
2 FRS -3735 -1051 52 C1- 765 -1051 102 COM12 4341 35
3 M -3645 -1051 53 C1- 855 -1051 103 COM11 4341 105
4 CL -3555 -1051 54 C1+ 945 -1051 104 COM10 4341 175
5 DISP -3465 -1051 55 C1+ 1035 -1051 105 COM9 4341 245
6 VSS -3375 -1051 56 C1+ 1125 -1051 106 COM8 4341 315
7 CS1B -3285 -1051 57 C2+ 1215 -1051 107 COM7 4341 385
8 CS2 -3195 -1051 58 C2+ 1305 -1051 108 COM6 4341 455

9 VDD -3105 -1051 59 C2- 1395 -1051 109 COM5 4341 525
10 E_RD -3015 -1051 60 C2- 1485 -1051 110 COM4 4341 595
11 RESETB -2925 -1051 61 C2- 1575 -1051 111 COM3 4341 665
12 VSS -2835 -1051 62 VDD 1665 -1051 112 COM2 4341 735
13 RS -2745 -1051 63 VEXT 1755 -1051 113 COM1 4341 805
14 RW_WR -2655 -1051 64 REF 1845 -1051 114 COM0 4341 875
15 DB0 -2565 -1051 65 VSS 1935 -1051 115 COMS 4341 945
16 DB1 -2475 -1051 66 V1 2025 -1051 116 DUMMY 4341 1015
17 DB2 -2385 -1051 67 V1 2115 -1051 117 DUMMY 3885 1016
18 DB3 -2295 -1051 68 V2 2205 -1051 118 DUMMY 3815 1016
19 DB4 -2205 -1051 69 V2 2295 -1051 119 DUMMY 3745 1016
20 DB5 -2115 -1051 70 V3 2385 -1051 120 DUMMY 3675 1016
21 DB6 -2025 -1051 71 V3 2475 -1051 121 DUMMY 3605 1016
22 DB7 -1935 -1051 72 V4 2565 -1051 122 DUMMY 3535 1016
23 VSS -1845 -1051 73 V4 2655 -1051 123 SEG0 3465 1016
24 MS -1755 -1051 74 V0 2745 -1051 124 SEG1 3395 1016
25 CLS -1665 -1051 75 V0 2835 -1051 125 SEG2 3325 1016
26 VDD -1575 -1051 76 VR 2925 -1051 126 SEG3 3255 1016
27 DCDC5B -1485 -1051 77 VR 3015 -1051 127 SEG4 3185 1016
28 C68 -1395 -1051 78 VSS 3105 -1051 128 SEG5 3115 1016
29 VSS -1305 -1051 79 VSS 3195 -1051 129 SEG6 3045 1016
30 VSS -1215 -1051 80 PS 3285 -1051 130 SEG7 2975 1016
31 VSS -1125 -1051 81 HPMB 3375 -1051 131 SEG8 2905 1016
32 VSS -1035 -1051 82 VDD 3465 -1051 132 SEG9 2835 1016
33 VSS -945 -1051 83 INTRS 3555 -1051 133 SEG10 2765 1016
34 VSS -855 -1051 84 TEMPS 3645 -1051 134 SEG11 2695 1016
35 VSS -765 -1051 85 VSS 3735 -1051 135 SEG12 2625 1016
36 DUTY -675 -1051 86 DUMMY 3825 -1051 136 SEG13 2555 1016
37 VDD -585 -1051 87 DUMMY 4341 -1015 137 SEG14 2485 1016
38 VDD -495 -1051 88 COM26 4341 -945 138 SEG15 2415 1016
39 VDD -405 -1051 89 COM25 4341 -875 139 SEG16 2345 1016
40 VDD -315 -1051 90 COM24 4341 -805 140 SEG17 2275 1016
41 VDD -225 -1051 91 COM23 4341 -735 141 SEG18 2205 1016
42 VDD -135 -1051 92 COM22 4341 -665 142 SEG19 2135 1016
43 VDD -45 -1051 93 COM21 4341 -595 143 SEG20 2065 1016
44 VOUT 45 -1051 94 COM20 4341 -525 144 SEG21 1995 1016
45 VOUT 135 -1051 95 COM19 4341 -455 145 SEG22 1925 1016
46 VOUT 225 -1051 96 COM18 4341 -385 146 SEG23 1855 1016
47 C3+ 315 -1051 97 COM17 4341 -315 147 SEG24 1785 1016
48 C3+ 405 -1051 98 COM16 4341 -245 148 SEG25 1715 1016
49 C3- 495 -1051 99 COM15 4341 -175 149 SEG26 1645 1016
50 C3- 585 -1051 100 COM14 4341 -105 150 SEG27 1575 1016

5

55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD S6B0717

Table 2. Pad Center Coordinates (Continued)

[Unit: µm]

No. Name X Y No. Name X Y No. Name X Y

151 SEG28 1505 1016 201 SEG78 -1995 1016 251 COM48 -4341 -525
152 SEG29 1435 1016 202 SEG79 -2065 1016 252 COM49 -4341 -595
153 SEG30 1365 1016 203 SEG80 -2135 1016 253 COM50 -4341 -665
154 SEG31 1295 1016 204 SEG81 -2205 1016 254 COM51 -4341 -735
155 SEG32 1225 1016 205 SEG82 -2275 1016 255 COM52 -4341 -805
156 SEG33 1155 1016 206 SEG83 -2345 1016 256 COM53 -4341 -875
157 SEG34 1085 1016 207 SEG84 -2415 1016 257 COMS -4341 -945
158 SEG35 1015 1016 208 SEG85 -2485 1016 258 DUMMY -4341 -1015
159 SEG36 945 1016 209 SEG86 -2555 1016
160 SEG37 875 1016 210 SEG87 -2625 1016
161 SEG38 805 1016 211 SEG88 -2695 1016
162 SEG39 735 1016 212 SEG89 -2765 1016
163 SEG40 665 1016 213 SEG90 -2835 1016
164 SEG41 595 1016 214 SEG91 -2905 1016
165 SEG42 525 1016 215 SEG92 -2975 1016
166 SEG43 455 1016 216 SEG93 -3045 1016
167 SEG44 385 1016 217 SEG94 -3115 1016
168 SEG45 315 1016 218 SEG95 -3185 1016
169 SEG46 245 1016 219 SEG96 -3255 1016
170 SEG47 175 1016 220 SEG97 -3325 1016
171 SEG48 105 1016 221 SEG98 -3395 1016
172 SEG49 35 1016 222 SEG99 -3465 1016
173 SEG50 -35 1016 223 DUMMY -3535 1016
174 SEG51 -105 1016 224 DUMMY -3605 1016
175 SEG52 -175 1016 225 DUMMY -3675 1016
176 SEG53 -245 1016 226 DUMMY -3745 1016
177 SEG54 -315 1016 227 DUMMY -3815 1016
178 SEG55 -385 1016 228 DUMMY -3885 1016
179 SEG56 -455 1016 229 DUMMY -4341 1015
180 SEG57 -525 1016 230 COM27 -4341 945
181 SEG58 -595 1016 231 COM28 -4341 875
182 SEG59 -665 1016 232 COM29 -4341 805
183 SEG60 -735 1016 233 COM30 -4341 735
184 SEG61 -805 1016 234 COM31 -4341 665
185 SEG62 -875 1016 235 COM32 -4341 595
186 SEG63 -945 1016 236 COM33 -4341 525
187 SEG64 -1015 1016 237 COM34 -4341 455
188 SEG65 -1085 1016 238 COM35 -4341 385
189 SEG66 -1155 1016 239 COM36 -4341 315
190 SEG67 -1225 1016 240 COM37 -4341 245
191 SEG68 -1295 1016 241 COM38 -4341 175
192 SEG69 -1365 1016 242 COM39 -4341 105
193 SEG70 -1435 1016 243 COM40 -4341 35
194 SEG71 -1505 1016 244 COM41 -4341 -35
195 SEG72 -1575 1016 245 COM42 -4341 -105
196 SEG73 -1645 1016 246 COM43 -4341 -175
197 SEG74 -1715 1016 247 COM44 -4341 -245
198 SEG75 -1785 1016 248 COM45 -4341 -315
199 SEG76 -1855 1016 249 COM46 -4341 -385
200 SEG77 -1925 1016 250 COM47 -4341 -455

6

S6B0717 55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD

PIN DESCRIPTION

POWER SUPPLY

Table 3. Power Supply Pins Description

Name I/O Description

VDD Supply Power supply

VSS Supply Ground

LCD driver supply voltages
The voltage determined by LCD pixel is impedance-converted by an operational amplifier

for application.
Voltages should have the following relationship;
V0 ≥ V1 ≥ V2 ≥ V3 ≥ V4 ≥ VSS
When the internal power circuit is active, these voltages are generated as following table
according to the state of LCD bias.

LCD bias V1 V2 V3 V4

1/8 bias (7/8) x V0 (6/8) x V0 (2/8) x V0 (1/8) x V0
1/6 bias (5/6) x V0 (4/6) x V0 (2/6) x V0 (1/6) x V0
1/5 bias (4/5) x V0 (3/5) x V0 (2/5) x V0 (1/5) x V0

V0
V1
V2
V3
V4

I/O

LCD DRIVER SUPPLY

Table 4. LCD Driver Supply Pins Description

Name I/O Description

C1- O Capacitor 1 negative connection pin for voltage converter

C1+ O Capacitor 1 positive connection pin for voltage converter

C2- O Capacitor 2 negative connection pin for voltage converter

C2+ O Capacitor 2 positive connection pin for voltage converter

C3- O Capacitor 3 negative connection pin for voltage converter

C3+ O Capacitor 3 positive connection pin for voltage converter

VOUT I/O Voltage converter input / output pin

DCDC5B

VR I

VEXT I External VREF input pin for the LCD power supply voltage regulator

REF I

5 times boosting circuit enable input pin. When this pin is low in 4 times boosting circuit,

I

the 5 times boosting voltage appears at VOUT
V0 voltage adjustment pin

It is valid only when on-chip resistors are not used (INTRS = “L”)

Selects the external VREF voltage via the VEXT pin

− REF = "H": using the internal VREF

− REF = "L": using the external VREF

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55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD S6B0717

SYSTEM CONTROL

Table 5. System Control Pins Description

Name I/O Description

Master / Slave operation select pin

− MS = "H": master operation

− MS = "L": slave operation

The following table depends on the MS status.

MS I

CLS I

CL I/O

M I/O

FRS O

DISP I/O

INTRS I

HPMB I

MS CLS

H

L - Disabled

Built-in oscillator circuit enable / disable select pin

− CLS = “H” : enable

− CLS = “L” : disable (external display clock input to CL pin)

Display clock input / output pin
When the S6B0717 is used in master / slave mode (multi-chip), the CL pins must be
connected each other.

LCD AC signal input / output pin
When the S6B0717 is used in master/slave mode (multi-chip), the M pins must be
connected each other.

− MS = “H” : output

− MS = “L” : input

Static driver segment output pin
This pin is used together with the M pin.

LCD display blanking control input/output
When S6B0717 is used in master/slave mode

(multi-chip), the DISP pins must be connected each other.

− MS = “H” : output

− MS = “L” : input

Internal resistor select pin
This pin selects the resistors for adjusting V0 voltage level.

− INTRS = "H": use the internal resistors

− INTRS = "L": use the external resistors

V0 voltage is controlled by VR pin and external resistive divider.
Power control pin of the power supply circuit for LCD driver

− HPMB = "L": high power mode

− HPMB = "H": normal mode

This pin is valid in master mode

H Enabled

L Disabled

OSC

circuit

Power supply

circuit

Enabled Output Output Output Output
Enabled Input Output Output Output

Disabled Input Input Output Input

CL M FRS DISP

TEMPS I

8

Test pin
This pin is fixed to High or Low.

S6B0717 55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD

Table 6. System Control Pins Description (Continued)

Name I/O Description

The LCD driver duty ratio select pin

DUTY I

− DUTY = "L": 1/34

− DUTY = "H": 1/55

NOTE: DUMMY – These pins should be opend (floated).

9

55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD S6B0717

MICROPROCESSOR INTERFACE

Table 7. Microprocessor Interface Pins Description

Name I/O Description

RESETB

PS I

C68 I

CS1B

CS2

RS I

RW_WR

Reset input pin

I

When RESETB is “L”, initialization is executed.
Parallel / Serial data input select input

PS

Interface

mode

H Parallel

L Serial

Chip

select

CS1B,

CS2

CS1B,

CS2

Data /

instruction

RS DB0 to DB7

Data Read / Write Serial clock

E_RD

RW_WR

RS SID (DB7) Write only SCLK (DB6)

*NOTE: In serial mode, it is impossible to read data from the on-chip RAM. And DB0 to
DB5 are high impedance and E_RD and RW_WR must be fixed to either “H” or “L”.

Microprocessor interface select input pin

− C68 = "H": 6800-series MPU interface

− C68 = "L": 8080-series MPU interface

Chip select input pins

I

Data / instruction I/O is enabled only when CS1B is “L” and CS2 is “H”. When chip
select is non-active, DB0 to DB7 may be high impedance.

Register select input pin

− RS = "H": DB0 to DB7 are display data

− RS = "L": DB0 to DB7 are control data

Read / Write execution control pin

C68 MPU type RW_WR Description

Read/Write control input pin

H 6800-series

I

RW

− RW = “H”: read

− RW = “L”: write

Write enable clock input pin

L 8080-series

/WR

The data on DB0 to DB7 are latched at the rising
edge of the /WR signal.

-

10

S6B0717 55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD

Table 8. Microprocessor Interface Pins Description (Continued)

Name I/O Description

Read / Write execution control pin

C68 MPU type E_RD Description

Read/Write control input pin

− RW = “H”: When E is “H”, DB0 to DB7 are in an

E_RD I

H 6800-series

E

output status.

− RW = “L”: The data on DB0 to DB7 are latched at
the falling edge of the E signal.

DB0
DB7

to

I/O

L 8080-series

/RD

Read enable clock input pin
When /RD is “L”, DB0 to DB7 are in an output status.

8-bit bi-directional data bus that is connected to the standard 8-bit microprocessor data
bus. When the serial interface selected (PS = "L");

− DB0 to DB5: high impedance

− DB6: serial input clock (SCLK)

− DB7: serial input data (SID)

When chip select is not active, DB0 to DB7 may be high impedance.

11

55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD S6B0717

LCD DRIVER OUTPUTS

Table 9. LCD Driver Outputs Pins Description

Name I/O Description

LCD segment driver outputs
The display data and the M signal control the output voltage of segment driver.

SEG0

to

SEG99

COM0

to

COM53

COMS O

O

O

Display data M

Segment driver output voltage

Normal display Reverse display
H H V0 V2
H L VSS V3

L H V2 V0
L L V3 VSS

Power save mode VSS VSS

LCD common driver outputs
The internal scanning data and M signal control the output voltage of common driver.

Scan data M Common driver output voltage

H H VSS
H L V0

L H V1
L L V4

Power save mode VSS

Common output for the icons
The output signals of two pins are same. When not used, these pins should be left open. In
multi-chip (master / slave) mode, all COMS pins on both master and slave units are the
same signal.

12

S6B0717 55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD

FUNCTIONAL DESCRIPTION

MICROPROCESSOR INTERFACE

Chip Select Input

There are CS1B and CS2 pins for chip selection. The S6B0717 can interface with an MPU only when CS1B is “L”
and CS2 is “H”. When these pins are set to any other combination, RS, E_RD, and RW_WR inputs are disabled and
DB0 to DB7 are to be high impedance. And, in case of serial interface, the internal shift register and the counter are
reset.

Parallel / Serial Interface

S6B0717 has three types of interface with an MPU, which are one serial and two parallel interfaces. This parallel or
serial interface is determined by PS pin as shown in table 10.

Table 10. Parallel / Serial Interface Mode

PS Type CS1B CS2 C68 Interface mode

H Parallel CS1B CS2

L Serial CS1B CS2

Parallel Interface (PS = "H")

The 8-bit bi-directional data bus is used in Parallel Interface and the type of MPU is selected by C68 as shown in
table 11. The type of data transfer is determined by signals at RS, E_RD and RW_WR as shown in table 12.

Table 11. Microprocessor Selection for Parallel Interface

C68 CS1B CS2 RS E_RD RW_WR

H CS1B CS2 RS E RW DB0 to DB7 6800-series
L CS1B CS2 RS /RD /WR DB0 to DB7 8080-series

Table 12. Parallel Data Transfer

Common

RS

H H H L H Display data read out
H H L H L Display data write
L H H L H Register status read
L H L H L Writes to internal register (instruction)

6800-series 8080-series

E_RD

(E)

RW_WR

(RW)

E_RD

(/RD)

RW_WR

(/WR)

H 6800-series MPU mode
L 8080-series MPU mode

*×

DB0 to DB7 MPU bus

Description

Serial-mode

*×: Don't care

13

55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD S6B0717

Serial Interface (PS = "L")

When the S6B0717 is active, serial data (DB7) and serial clock (DB6) inputs are enabled. And not active, the internal
8-bit shift register and the 3-bit counter are reset. Serial data can be read on the rising edge of serial clock going into
DB6 and processed as 8-bit parallel data on the eighth serial clock. Serial data input is display data when RS is high
and control data when RS is low. Since the clock signal (DB6) is easy to be affected by the external noise caused by
the line length, the operation check on the actual machine is recommended.

CS1B

CS2

SID

SCLK

RS

DB6DB7DB0DB1DB2DB3DB4DB5DB6DB7

Figure 3. Serial Interface Timing

Busy Flag

The Busy Flag indicates whether the S6B0717 is operating or not. When DB7 is “H” in read status operation, this
device is in busy status and will accept only read status instruction. If the cycle time is correct, the microprocessor
needs not to check this flag before each instruction, which improves the MPU performance.

14

S6B0717 55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD

Data Transfer

The S6B0717 uses bus holder and internal data bus for Data Transfer with the MPU. When writing data from the
MPU to on-chip RAM, data is automatically transferred from the bus holder to the RAM as shown in figure 4. And
when reading data from on-chip RAM to the MPU, the data for the initial read cycle is stored in the bus holder
(dummy read) and the MPU reads this stored data from bus holder for the next data read cycle as shown in figure 5.
This means that a dummy read cycle must be inserted between each pair of address sets when a sequence of
address sets is executed. Therefore, the data of the specified address cannot be output with the read display data
instruction right after the address sets, but can be output at the second read of data.

MPU signals

RS

/WR

DB0 to DB7

Internal signals

/WR

BUS HOLDER

COLUMN ADDRESS

N D(N) D(N+1) D(N+2) D(N+3)

N D(N) D(N+1) D(N+2) D(N+3)

N N+1 N+2 N+3

Figure 4. Write Timing

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55 COM / 100 SEG DRIVER & CONTROLLER FOR STN LCD S6B0717

N

D(N)

D(N+1)

D(N+2)

N

N+1

N+2

N+3

MPU signals

RS

/WR

/RD

DB0 to DB7

Internal signals

/WR

/RD

BUS HOLDER

COLUMN ADDRESS

N

Dummy D(N) D(N+1)

Figure 5. Read Timing

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