UPD30121 datasheet(60/76 Pages) NEC

60 / 76 page

Data Sheet U14691EJ1V0DS00

µµµµPD30121

(16) LCD interface parameter (1/2)

Parameter

Symbol

Condition

MIN.

MAX.

Unit

Address setup time (to command signal

↓)Note1

tAS

Address hold time (from command signal

↑)Note1

tAH

0ns

Command signal recovery time

Note 1

tRY

LCDRDY sampling start time

tCLR

0ns

Command signal delay time from LCDRDY

↑Notes1, 2

tRHCH

× NT × (N + 2) + 29

LCDRDY hold time (from command signal

↑)Note1

tRYZ

0ns

Data output setup time (to command signal

↑)Notes1, 2

tDVCH

× (N + 2)

Data output hold time (from command signal

↑)Note1

tCHDV

Data input setup time (to command signal

↑)Note1

tDS

0ns

Data input hold time (from command signal

↑)Note1

tDH

5ns

Notes 1. With the VR4121, the RD# and WR# signals are called the command signals for the LCD interface.

2. The values of N is set by using the WLCD/M (0:1) bits of the BCUSPEEDREG register.

The value of T is set by using the CLKSEL (0:2) signals (TxD/CLKSEL2, RTS#/CLKSEL1, and

DTR#/CLKSEL0 pins).

CLKSEL2

Signal

CLKSEL1

Signal

CLKSEL0

Signal

T (ns)

WLCD/M1

Bit

WLCD/M0

Bit

(TClock)

RFU

008

016

104

112

Remarks 1. Do not set CLKSEL (2:0) signal

= 111.

2. Do not set CLKSEL (2:0) signal

= 110, 101 with 131 MHz model.

UPD30121 Datasheet(PDF) 60 Page - NEC

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