W921C880 Просмотр технического описания (PDF) - Winbond

Номер в каталоге

Компоненты Описание

Список матч

W921C880

4-BIT MICROCONTROLLER

Winbond 

W921E880A/W921C880

1. GENERAL DESCRIPTION

The W921E880A/W921C880 are 4-bit micro-processor fabricated by CMOS process. With a single

channel DTMF generator, an 8-bit D/A converter circuit, a built in four by one channel comparator

circuit and four multi-function timers. The excellent memory structure, 8K super EPROM in

W921E880A and 8K mask ROM in W921C880 for program code and 1536 x 4 bit RAM minimize the

need for external memory devices. The W921E880A/W921C880 provides good solution for

consumming application, especially for telecommunication design with few external components.

Using the serial transmit/receive function, the W921E880A/W921C880 can interface with the

Winbond LCD driver IC using the serial control circuit.

2. FEATURES

Memory

• ROM (Super EPROM): 8K × 10 bits

• RAM: 1536 × 4 bits

− 64 × 4 bit Special registers

− 16 × 4 bit Working registers

− 128 × 4 bit General registers

− 304 × 4 bit Multi-purpose registers4 bit serial buffer registers

− 512 × 4-bit × 2 banks

Dual-clock Operation

• Crystal or RC for the main system clock: RC up to 4 MHz

Crystal for 400 K, 800 K, 2 M, 3.58 M, 4 MHz

• Crystal for subsystem clock: 32.768 KHz

I/O Pins

• 32 bidirectional and individually controllable I/O lines:

− P0 Port: P0.0−P0.3 large drive current Pins

− P1 Port: P1.0−P1.3 large drive current Pins

− P2 Port: P2.0−P2.3 large sink current pins and open drain option

− P3 Port: P3.0−P3.3 multi-function I/O

− P4 Port: P4.0−P4.3 open drain and pull high resistor option, multi-function I/O

− P5 Port: P5.0−P5.3 multi-function I/O

− P6 Port: P6.0−P6.3 open drain and pull high resistor option, multi-function I/O

− P7 Port: P7.0−P7.3 large sink current pins and open drain option

• 32 bidirectional I/O lines:

− P8 Port: P8.0−P8.3 large drive current pins

− P9 Port: P9.0−P9.3 large sink current pins and open drain option

Publication Release Date: July 1999

-3-

Revision A3

Share Link: