SA1110 Datasheet, PDF (184/406 Pages) Intel Corporation – Intel StrongARM SA-1110 Microprocessor

Peripheral Control Module
11.4 Peripheral Pins
.
Table 11-4.
Each peripheral has a number of dedicated pins with which to communicate to off-chip devices.
The six peripherals of the SA-1110 use a total of 24 pins: the LCD uses twelve pins; serial port 4
four pins; and serial port 0 through 3 each use two pins. Many applications may not require the use
of all six of the SA-1110’s peripherals. To provide maximum flexibility, the pins associated with
any unused peripheral (except serial port 0) can be used as general-purpose digital input/output
pins that are noninterruptible. When a peripheral is disabled, the peripheral pin controller (PPC)
automatically takes control of the peripheral’s pin direction and pin state. A user can sample input
pin state by reading the PPC pin state register (PPSR) and control the state of an output pin by
writing to it. Pin direction is established by configuring the PPC pin direction register (PPDR).
Table 11-4 shows a list of the pins associated with the peripheral units.
Dedicated Peripheral Pins
Peripheral
LCD Controller
Serial port 0: USB
Serial port 1: UART
Serial port 2: ICP
Serial port 3: UART
Serial port 4: MPC/SSP
GPIO Pin
L_PCLK
L_LCLK
L_FCLK
L_BIAS
LDD<7:0>
UDC+
UDC-
TXD_1
RXD_1
TXD_2
RXD_2
TXD_3
RXD_3
TXD_C
RXD_C
SCLK_C
SFRM_C
Function
Pixel clock
Line clock/horizontal sync pulse
Frame clock/vertical sync pulse
A/C bias signal
Pixel data
Positive differential receiver
Negative differential receiver
Serial transmit data
Serial receive data
Serial transmit data
Serial receive data
Serial transmit data
Serial receive data
Serial transmit data
Serial receive data
Serial clock
Serial frame clock
11-4
SA-1110 Developer’s Manual