PSD81XFX, PSD83XF2, PSD85XF2
16/103
Note: 1. The pin numbers in this table are for the PLCC package only. See the package information, on page 98 onwards, for pin numbers
on other package types.
2. These functions can be multiplexed with other functions.
PSD8XXFX REGISTER DESCRIPTION AND ADDRESS OFFSET
Table 7 shows the offset addresses to the
PSD8XXFX registers relative to the CSIOP base
address. The CSIOP space is the 256 bytes of ad-
dress that is allocated by the user to the internal
PSD8XXFX registers. Table 7 provides brief de-
scriptions of the registers in CSIOP space. The fol-
lowing section gives a more detailed description.
PC5
13
I/O
PC5 pin of Port C. This port pin can be configured to have the following functions:
1. MCU I/O – write to or read from a standard output or input port.
2. CPLD macrocell (McellBC5) output.
3. Input to the PLDs.
4. TDI input
2
for the JTAG Serial Interface.
This pin can be configured as a CMOS or Open Drain output.
PC6
12
I/O
PC6 pin of Port C. This port pin can be configured to have the following functions:
1. MCU I/O – write to or read from a standard output or input port.
2. CPLD macrocell (McellBC6) output.
3. Input to the PLDs.
4. TDO output
2
for the JTAG Serial Interface.
This pin can be configured as a CMOS or Open Drain output.
PC7
11
I/O
PC7 pin of Port C. This port pin can be configured to have the following functions:
1. MCU I/O – write to or read from a standard output or input port.
2. CPLD macrocell (McellBC7) output.
3. Input to the PLDs.
4. DBE – active Low Data Byte Enable input from 68HC912 type MCUs.
This pin can be configured as a CMOS or Open Drain output.
PD0
10
I/O
PD0 pin of Port D. This port pin can be configured to have the following functions:
1. ALE/AS input latches address output from the MCU.
2. MCU I/O – write or read from a standard output or input port.
3. Input to the PLDs.
4. CPLD output (External Chip Select).
PD1
9
I/O
PD1 pin of Port D. This port pin can be configured to have the following functions:
1. MCU I/O – write to or read from a standard output or input port.
2. Input to the PLDs.
3. CPLD output (External Chip Select).
4. CLKIN – clock input to the CPLD macrocells, the APD Unit’s Power-down counter, and
the CPLD AND Array.
PD2
8
I/O
PD2 pin of Port D. This port pin can be configured to have the following functions:
1. MCU I/O
–
write to or read from a standard output or input port.
2. Input to the PLDs.
3. CPLD output (External Chip Select).
4. PSD Chip Select Input (CSI). When Low, the MCU can access the PSD8XXFX
memory and I/O. When High, the PSD8XXFX memory blocks are disabled to conserve
power.
V
CC
15, 38
Supply Voltage
GND
1, 16,
26
Ground pins
Pin Name
Pin
Type
Description