2

LH1691

PIN DESCRIPTION

BLOCK DIAGRAM

PIN NO.

SYMBOL

I/O

DESCRIPTION

1 to 240

O

LCD drive output pins

241, 258

–

Power supply pins for LCD drive

242, 257

–

Power supply pins for LCD drive

243, 256

–

Power supply pins for logic system

244, 255

–

Power supply pins for logic system

245, 254

–

Power supply pins for input level shifter

249

CE

I

Cascade sequence setting pin

250

SPV

I

Vertical scanning start pulse input pin

251

CKV

I

Vertical shift clock input pin

252, 253

I

IC test pins

241

246

247

R/L

CE

SPV

CKV

248

249

250

251

252

253

258

245

254

244

255

242

257

243

256

1

240

OUTPUT CIRCUIT

LEVEL SHIFTER

BI-DIRECTIONAL SHIFT

REGISTER

CONTROL

LOGIC

1

240

1

240

1

240

Pin for selecting bi-directional shift register and setting cascade

sequence

I

R/L

248

Output mode selection pins

I

246, 247