EP7212 Datasheet, PDF (16/136 Pages) Cirrus Logic – HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI)

EP7212
Function
DAI, Codec or
SSI2
Interface
(See Table 5 for
pin assignment
and direction fol-
lowing multiplex-
ing)
ADC
Interface
(SSI1)
IrDA and
RS232
Interfaces
LCD
Keyboard &
Buzzer drive
LED Flasher
Signal
Name
SSICLK
SSITXFR
SSITXDA
SSIRXDA
Signal
Description
I/O DAI/Codec/SSI2 clock signal
I/O DAI/Codec/SSI2 serial data output frame/synchronization pulse output
O DAI/Codec/SSI2 serial data output
I DAI/Codec/SSI2 serial data input
SSIRXFR
ADCCLK
nADCCS
ADCOUT
ADCIN
SMPCLK
LEDDRV
PHDIN
TXD[1-2]
RXD[1-2]
DSR
DCD
CTS
DD[0-3]
CL[1]
CL[2]
FRM
M
COL[0-7]
BUZ
PD[0]/
LEDFLSH
I/O SSI2 serial data input frame/synchronization pulse
DAI external clock input
O Serial clock output
O Chip select for ADC interface
O Serial data output
I Serial data input
O Sample clock output
O Infrared LED drive output (UART1)
I Photo diode input (UART1)
O RS232 UART1 and 2 TX outputs
I RS232 UART1 and 2 RX inputs
I RS232 DSR input
I RS232 DCD input
I RS232 CTS input
I/O LCD serial display data; pins can be used on power up to read the ID of some
LCD modules (See Table 6).
O LCD line clock
O LCD pixel clock
O LCD frame synchronization pulse output
O LCD AC bias drive
O Keyboard column drives (SYSCON1)
O Buzzer drive output (SYSCON1)
O LED flasher driver — multiplexed with Port D bit 0. This pin can provide up to
4 mA of drive current.
Table 4. External Signal Functions (cont.)
16
DS474PP1