參數(shù)資料
型號(hào)： CL-PS7110
廠商： Cirrus Logic, Inc.
英文描述： Low-Power System-on-a-Chip
中文描述： 低功耗系統(tǒng)級晶片
文件頁數(shù)： 33/82頁
文件大?。?/td> 1101K
代理商： CL-PS7110
May 1997
33
DATA BOOK v1.5
PIN INFORMATION
CL-PS7110
Low-Power System-on-a-Chip
Power
Management
NPWRFL
I
Power fail input. Active-low de-glitched input to force system into the standby state.
BATOK
I
Main battery OK input. Falling edge generates a FIQ, a low level in standby inhibits
system start up; de-glitched input.
NEXTPWR
I
External power sense. Must be driven low if the system is powered by external
source.
NBATCHG
I
New battery sense; driven low if battery voltage falls below the ‘no-battery’ threshold.
State Control
NPOR
I
Power on reset input. Active-low input completely resets the system.
RUN
O
System active output; high when system is active or idle; low while in the standby
state.
WAKEUP
I
Wake up input signal. Rising edge forces system into operating state; active after a
power on reset.
NURESET
I
User reset input. Active-low input from user reset button.
Codec Interface
PCMCK
O
Codec clock output.
PCMSYNC
O
Codec synchronization, pulse output.
PCMOUT
O
Codec serial data output.
PCMIN
I
Codec serial data input.
Synchronous
Serial Interface
ADCCLK
O
Serial ADC clock output.
SMPLCK
O
Serial ADC sample clock, can be disabled.
NADCCS
O
Serial ADC active-low chip select and synchronization output.
ADCOUT
O
Serial ADC serial data output.
ADCIN
I
Serial ADC serial data input.
IrDA and RS232
Interface
LEDDRV
O
Infrared LED drive output.
PHDIN
I
Photo diode input.
TxD
O
RS232 Tx output.
RxD
I
RS232 Rx input.
DSR
I
RS232 DSR input.
DCD
I
RS232 DCD input.
CTS
I
RS232 CTS input.
Table 2-1.
External Signal Functions
(cont.)
Function
Signal
Name
Signal
Description
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