SA1110 Datasheet, PDF (354/406 Pages) Intel Corporation – Intel StrongARM SA-1110 Microprocessor

Peripheral Control Module
Because the peripherals are reset when sleep mode is entered, serial port 2’s transmit and receive
pin (TXD2 and RXD2) polarity bits (TXP and RXP) are both reset to one, which configures
transmit and receive data as true or noninverted data. Thus the user need not reprogram these bits
prior to the invocation of sleep mode.
Note that PSDR is initialized only by a hardware or power-on reset (negation of the nRESET pin). It
is not affected by a software reset or a reset that occurs as a result of the SA-1110 entering sleep
mode. Also note that for reserved bits, writes are ignored and reads return zero. The following table
shows the location of each sleep mode pin direction bit and to which peripheral pin it corresponds.
0h 9006 000C
PPC Pin Sleep Mode Direction
Register: PSDR
Read/Write
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reserved
00000000001111111111111111111111
(Sheet 1 of 2)
Bits
Name
Description
LCD data sleep mode pin direction.
7..0
LDD 7..0 _{0 – LCD data pin configured as output and is driven low during sleep.}
1 – LCD data pin configured as input during sleep.
LCD pixel clock sleep mode pin direction.
8
L_PCLK _{0 – LCD pixel clock pin configured as output and is driven low during sleep.}
1 – LCD pixel clock pin configured as input during sleep.
LCD line clock sleep mode pin direction.
9
L_LCLK _{0 – LCD line clock pin configured as output and is driven low during sleep.}
1 – LCD line clock pin configured as input during sleep.
LCD frame clock sleep mode pin direction.
10
L_FCLK _{0 – LCD frame clock pin configured as output and is driven low during sleep.}
1 – LCD frame clock pin configured as input during sleep.
LCD ac bias sleep mode pin direction.
11
L_BIAS _{0 – LCD ac bias pin configured as output and is driven low during sleep.}
1 – LCD ac bias pin configured as input during sleep.
Serial port 1: UART transmit sleep mode pin direction.
12
TXD1 _{0 – Transmit pin configured as output and is driven low during sleep.}
1 – Transmit pin configured as input during sleep.
Serial port 1: UART receive sleep mode pin direction.
13
RXD1 _{0 – Receive pin configured as output and is driven low during sleep.}
1 – Receive pin configured as input during sleep.
Serial port 2: IPC transmit sleep mode pin direction.
14
TXD2 _{0 – Transmit pin configured as output and is driven low during sleep.}
1 – Transmit pin configured as input during sleep.
Serial port 2: IPC receive sleep mode pin direction.
15
RXD2 _{0 – Receive pin configured as output and is driven low during sleep.}
1 – Receive pin configured as input during sleep.
Serial port 3: UART transmit sleep mode pin direction.
16
TXD3 _{0 – Transmit pin configured as output and is driven low during sleep.}
1 – Transmit pin configured as input during sleep.
11-174
SA-1110 Developer’s Manual