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Table 2-1. Signal Descriptions (Continued)
SIGNAL
PIN NUMBER
PA[5]
T6
CLK3
TIN2
L1TCLKA
BRGO2
PA[4]
R6
CLK4
TOUT2
TIN4
L1TCLKB
PB[31]
N14
SPISEL
LCD_A
PB[30]
P15
SPICLK
TXD3
PB[29]
P14
SPIMOSI
RXD3
PB[28]
T15
SPIMISO
BRGO3
PB[27]
T14
I2CSDA
BRGO1
PB[26]
P12
I2CSCL
BRGO2
PB[25]
N11
SMTXD1
TXD3
PB[24]
T11
SMRXD1
RXD3
L1RXDB
PB[23]
T10
SMSYN1
CTS3
SDACK1
L1RSYNCB
MOTOROLA
General-Purpose I/O Port A Bit 5—Bit 5 of the general-purpose I/O port A.
CLK3—This input signal is one of the four clock pins that can be used to clock the
serial communication controllers, serial management controllers, and USB.
TIN2—The timer 2 external clock input pin.
L1TCLKA—The transmit clock for the serial interface time-division multiplex port A.
BRGO2—The output clock of BRG2.
General-Purpose I/O Port A Bit 4—Bit 4 of the general-purpose I/O port A.
CLK4—This input signal is one of the four clock pins that can be used to clock the
serial communication controllers, serial management controllers, and USB.
TOUT2—The timer 2 output pin.
TIN4—The timer 4 external clock pin.
L1TCLKB—The transmit clock for the serial interface time-division multiplex port A.
General-Purpose I/O Port B Bit 31—Bit 31 of the general-purpose I/O port B.
SPISEL—The serial peripheral interface slave select input pin.
LCD_A—This is one of the LCD controller's three extension data bits, which are
used to drive an active LCD panel. When using a 12-bit bus instead of a 9-bit bus,
the LCD_A signal is the least-significant bit of the red 4-bit code. The red portion of
the bus consists of LD[0:2] and LCD_A.
General-Purpose I/O Port B Bit 30—Bit 30 of the general-purpose I/O port B.
SPICLK—The serial peripheral interface output clock when it is configured as a
master or serial peripheral interface input clock when it is configured as a slave.
TXD3—The transmit data output signal for serial communication controller 3. TXD3
has open-drain capability.
General-Purpose I/O Port B Bit 29—Bit 29 of the general-purpose I/O port B.
SPIMOSI—The serial peripheral interface output data when it is configured as a
master or serial peripheral interface input data when it is configured as a slave.
RXD3—The receive data input signal for serial communication controller 3.
General-Purpose I/O Port B Bit 28—Bit 28 of the general-purpose I/O port B.
SPIMISO—The serial peripheral interface input data when it is configured as a
master or serial peripheral interface output data when it is configured as a slave.
BRGO3—The output clock of BRG3.
General-Purpose I/O Port B Bit 27—Bit 27 of the general-purpose I/O port B.
2
I2CSDA—The I
C serial data pin. This pin is bidirectional and should be configured
as an open-drain output.
BRGO1—The output clock of BRG1.
General-Purpose I/O Port B Bit 26—Bit 26 of the general-purpose I/O port B.
2
I2CSCL—The I
C serial clock pin. This pin is bidirectional and should be configured
as an open-drain output.
BRGO2—The output clock of BRG2.
General-Purpose I/O Port B Bit 25—Bit 25 of the general-purpose I/O port B.
SMTXD1—The serial management controller 1 transmit data output pin.
TXD3—The transmit data output signal for serial communication controller 3. TXD3
has open-drain capability.
General-Purpose I/O Port B Bit 24—Bit 24 of the general-purpose I/O port B.
SMRXD1—The serial management controller 1 receive data input pin.
RXD3—The receive data input signal for serial communication controller 3.
L1RXDB—The receive data input signal for the serial interface time-division
multiplex port B.
General-Purpose I/O Port B Bit 23—Bit 23 of the general-purpose I/O port B.
SMSYN1—The serial management controller 1 external sync input pin.
CTS3—The Clear to Send Modem line for serial communication controller 3.
SDACK1—The SDMA acknowledge 1 output pin that is used as a peripheral
interface signal for IDMA emulation.
L1RSYNCB—The transmit sync input for the serial interface time-division multiplex
port B.
MPC823e REFERENCE MANUAL
External Signals
DESCRIPTION
2-9
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