Signal Descriptions
MOTOROLA
MPC821FADS-DB USER’S MANUAL
5-37
A28
IRQ2
I, L
Interrupt Request line 2. RSV/IRQ2 on the MPC821. See PM2(26).
A29
IRQ1
I, L
Interrupt Request line 1. See PM2(126).
A30
NMI
I, L
Non-Maskable Interrupt signal. See PM2(134).
A31
RS_EN1
O,L
Reset Enable 1 signal. See PM3(96).
A32
GND
—
B1
PB31
I/O
Port B Bit 31. See PM3(33).
B2
PB30
I/O
Port B Bit 30. See PM3(35).
B3
PB29
I/O
Port B Bit 29. See PM3(37).
B4
PB28
I/O
Port B Bit 28. See PM3(51).
B5
I2CDAT
I/O
I
2
C Data signal. See PM3(50).
B6
I2CCLK
I/O
I
2
C Clock signal. See PM3(54).
B7
RSTXD1
I/O
RS-232 Transmit 1 signal. See PM3(38).
B8
RSRXD1
I/O
RS-232 Receive 1 signal. See PM3(39).
B9
RSDTR1
I/O
RS-232 Data Terminal Ready 1 signal. See PM3(40).
B10
RSDTR2
I/O
RS-232 Data Terminal Ready 2 signal. See PM3(44).
B11
RSTXD2
I/O
RS-232 Transmit Data 2 signal. See PM3(5,11,42).
B12
RSRXD2
I/O
RS-232 Reveive Data 2 signal. See PM3(43).
B13
E_TENA
I/O
Ethernet Transmit Enable signal. See PM3(77).
B14
PB19
I/O
Port B Bit 19. See PM3(76).
B15
PB17
I/O
Port B Bit 17. See PM3(75).
B16
PB16
I/O
Port B Bit 16. See PM3(93).
B17
—
—
Not connected.
B18
—
—
Not connected.
B19
GND
—
B20
BINPAK
I/O
Buffered INPAK signal. See PM3(34).
B21
PC14
I/O
Port C Bit 14. See PM3(45).
B22
PC13
I/O
Port C Bit 13. See PM3(26).
B23
PC12
I/O
Port C Bit 12. See PM3(53).
B24
E_CLSN
I/O
Ethernet Collision signal.
See PM3(61).
B25
E_RENA
I/O
Ethernet Receive Enable signal. See PM3(62).
B26
USBRXP
I/O
Universal Serial Bus Receive Positive signal. PC11 on the MPC821.
See PM3(8).
B27
USBRXN
I/O
Universal Serial Bus Receive Negative signal. PC10 on the
MPC821. See PM3(14).
Table 5-14. P13 Interconnect Signals (Continued)
PIN
SIGNAL
INPUT/
OUTPUT
DESCRIPTION
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
.
..
AR
CH
IVE
D B
Y F
RE
ES
CA
LE
SE
MI
CO
ND
UC
TO
R,
IN
C.