Signal Descriptions
MOTOROLA
MPC821FADS-DB USER’S MANUAL
5-21
86
RSTCNF
RSTCNF
O, L
Hard Reset Configuration signal. It is driven
during hard reset to the daughterboard to tell
the MPC821 that it should sample hard reset
configuration from the data bus.
87
GND
GND
—
88
R_PORI
R_PORI
O, L
Main battery power-on reset signal. Generated
when the main 3.3V bus goes through
power-up or power-down. Drives onboard logic
as well hard reset or power-on reset to the
MPC821.
89
GND
GND
—
90
91
92
BWAITA
BWAITA
O, L
Buffered Wait signal for PCMCIA slot A. Used
to prolong cycles to slow PC cards.
93
GND
GND
—
94
BWP
BWP
O, H
Buffered Write-Protect signal for PCMCIA slot
A. IP_A2/IOIS16A on the MPC821. Used as
PC card write-protect indication or as 16-bit I/O
capability indication for PCMCIA slot A.
95
GND
GND
—
96
BVS1
BVS1
O,X
Buffered Voltage Sense 1 signal for PCMCIA
slot A. IP_A0 on the MPC821. Used in
conjunction with BVS2 to determine the
operation voltage of a PCMCIA card.
97
GND
GND
—
98
BRDY
BRDY
O, H
Buffered Ready signal for PCMCIA slot A.
IP_A7 on the MPC821. Used as PCMCIA port
A card ready indication.
99
GND
GND
—
100
101
102
DP3
DP3
I/O, X
Data Parity line 3. DP3/IRQ6 on the MPC821.
This signal can generate and receive parity
data for the D[24:31] bits that are connected to
the DRAM SIMM. It may also be configured as
IRQ6 signal for the MPC821.
103
GND
GND
—
104
BVS2
BVS2
O, X
Buffered Voltage Sense 2 signal for PCMCIA
slot A. IP_A1 on the MPC821. Used in
conjunction with BVS1 to determine the
operation voltage of a PCMCIA card.
105
GND
GND
—
106
BCD1
BCD1
O, L
Buffered Card Detect 1 signal for PCMCIA slot
A. IP_A4 on the MPC821. Used as a card
detect indication in conjunction with BCD2.
107
GND
GND
—
Table 5-10. PM2 Interconnect Signals (Continued)
PIN
MOTHERBOARD
SIGNAL
DAUGHTERBOARD
SIGNAL
INPUT/
OUTPUT
DESCRIPTION
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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