CL-PS7111-VC-A 查看數據表（PDF） - Cirrus Logic

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CL-PS7111-VC-A

Low-Power System-on-a-Chip

Cirrus Logic 

CL-PS7111

Low-Power System-on-a-Chip

2.2.1

External Signal Functions (cont.)

Function

Signal

Name

Type Description

Keyboard

Buzzer Drive

COL[0–7]

BUZ

O Keyboard column drives.

O Buzzer drive output in 18.432-MHz mode.

General-

Purpose I/O

PA[0–7]

PB[0–7]

I/O Port A I/O.

I/O Port B I/O (default input).

PD[0–7]

I/O Port D I/O (higher drive, default output).

PE[0–2]

I/O Port E I/O (three bits only, default input).

DC-to-DC Drives DRIVE[0–1] O DC-to-DC converter drive outputs.

FB[0–1]

I DC-to-DC feedback inputs.

Test

NTEST[0–1] I Test mode select inputs.

Oscillators

MOSCIN/

MOSOUT

I/O Main 3.6864-MHz oscillator for 18.432-MHz PLL.

RTCIN/

RTCOUT

I/O Realtime clock 32.768-kHz oscillator.

September 1997

PRELIMINARY DATA BOOK v2.0

11

PIN INFORMATION

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