User's Manual

© SENSITECH INC. CONFIDENTIAL – CONTROLLED DOCUMENT Page 70 of 83
A Carrier Corp. Company
PART NUMBER T82002163
REV A
Interface Signals:
Pin No. Symbol Function
1 VDD POWER SUPPLY FOR LOGIC CIRCUIT
2 VSS GROUND
3 VLCD POWER SUPPLY FOR LCD DRIVING VOLTAGE
4 FLM THE FLM SIGNAL INDICATING THE BEGINNING OF
EACH DISPLAY CYCLE
5 N/C N/C
6 CL1 DISPLAY DATA LATCH
7 CL2 DISPLAY DATA SHIFT
8 D0 DISPLAY DATA
9 D1 DISPLAY DATA
10 D2 DISPLAY DATA
11 D3 DISPLAY DATA
12 /DISPOFF
CONTROL LCD ON/OFF
“L”: DISPLAY OFF,
“H” DISPLAY ON
13 VLED POWER SUPPLY FOR LED B.L
14 VLSS POWER SUPPLY FOR LED B.L
Switching Characteristics:
PARAMETER SYMBOL MIN. TYP. MAX UNIT
CL1 PULSE
WIDTH
tw1 30 - - ns
CL2 PULSE tw 51 - - ns
RISE, FALL
TIME
tr, tf - - 50 ns
DATA SETUP
TIME
tDSU 30 - - ns
DATA HOLD
TIME
tDHD 40 - - ns
CL1 SETUP TIME tLSU 51 - - ns
CL1 to CL2 TIME tLC 51 - - ns
FLM SETUP
TIME
tsetup 30 - - ns
FLM HOLD TIME thold 50 - - ns
LCD Power ON Sequencing:
1. Logic Circuit Power Supply 3.3VDC (no GPIO)
2. Data Signals (no GPIO)
3. LED Back Light Power Supply 5VDC (GPIO 22, LCD_BL_EN)
4. LCD Contrast Power Supply 3.3VDC (GPIO 12, VLCD_EN)
5. LCD Enable Signal “CONTROL LCD ON/OFF” (GPIO 77, LCD_MDISP)