參數資料
型號: CL-PS7111
廠商: Cirrus Logic, Inc.
英文描述: Low-Power System-on-a-Chip
中文描述: 低功耗系統級晶片
文件頁數: 21/105頁
文件大?。?/td> 1207K
代理商: CL-PS7111
PRELIMINARY DATA BOOK v2.0
September 1997
20
FUNCTIONAL DESCRIPTION
CL-PS7111
Low-Power System-on-a-Chip
3.2
System Maximization
A maximum-configured system using the CL-PS7111 is shown in
Figure 3-3
. This system assumes all
DRAMs and ROMs are 16-bit-wide devices. Watch-dog-timer tick rate is 1 Hz (in 13-MHz and 18.432-MHz
modes). This 1-Hz clock is generated by a divider chain that divides the 64-Hz clock. The LSB of the
RTCDIV field (SYSFLG[21:16]) provides the 1-Hz clock.
NOTE:
The keyboard can be connected to more GPIO bits than illustrated to allow more than 64 keys. These extra
pins, however, will not be wired into the WAKEUP pin functionality.
Figure 3-3. A Maximized CL-PS7111–Based System
LCD MODULE
KEYBOARD
BATTERY
DC-TO-DC
CONVERTERS
ADC
DIGITIZER
IR LED AND
PHOTODIODE
2
×
RS-232
TRANSEIVER
ADDITIONAL I/O
CL-PS6700
PC CARD
CONTROLLER
PC CARD
SOCETS
NCS[4]
PB0
EXPCLK
DD[3:0]
D[31:0]
A[27:0]
NMOE
WRITE
COL[7:0]
PA[7:0]
DC
INPUT
NRAS[1]
NRAS[0]
NCAS[0]
NCAS[1]
NCAS[2]
NCAS[3]
PB[7:0]
PD[7:0]
PE[2:0]
NPOR
NPWRFL
BATOK
NEXTPWR
NBATCHG
RUN
WAKEUP
NCS[0]
NCS[1]
DRIVE[1:0]
FB[1:0]
CL-PS7111
ADCCLK
NADCCS
ADCOUT
ADCIN
SMPCLK
LEDDRV
PHDIN
RXD1/2
TXD1/2
DSR
CTS
DCD
CS[n]
WORD
NCS[2]
NCS[3]
×
16
DRAM
×
16
DRAM
×
16
FLASH
EXTERNAL MEMORY
MAPPED EXPANSION
BUFFERS
BUFFERS
AND
LATCHES
×
16
ROM
×
16
DRAM
×
16
DRAM
POWER
SUPPLY UNIT
AND
COMPARATORS
OSCILLATOR
CODEC
PCMSYNC
PCMOUT
PCMCLK
PCMIN
×
16
FLASH
×
16
ROM
CL1
CL2
FRM
M
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