MC68HC912B32 Datasheet, PDF (18/128 Pages) Motorola, Inc – 16-Bit Microcontroller

Table 6 MC68HC912B32 Port Description Summary
Pin
Data Direction
Port Name Numbers DD Register (Address)
Description
Port A
PA[7:0]
Port B
PB[7:0]
46–39
25–18
In/Out
DDRA ($0002)
In/Out
DDRB ($0003)
Port A and port B pins are used for address and data in ex-
panded modes. The port data registers are not in the address
map during expanded and peripheral mode operation. When
in the map, port A and port B can be read or written any time.
DDRA and DDRB are not in the address map in expanded or
peripheral modes.
Port AD
PAD[7:0]
58–51
In
Analog-to-digital converter and general-purpose I/O.
Port DLC
PDLC[6:0]
70–76
In/Out
DDRDLC ($00FF)
Byte Data Link Communication (BDLC) subsystem and
general-purpose I/O.
Port E
PE[7:0]
26–29, 35–38
PE[1:0] In
PE[7:2] In/Out
DDRE ($0009)
Mode selection, bus control signals and interrupt service
request signals; or general-purpose I/O.
Port P
PP[7:0]
79, 80, 1–6
In/Out
DDRP ($0057)
General-purpose I/O. PP[3:0] are use with the pulse-width
modulator when enabled.
Port S
PS[7:0]
68–61
In/Out
DDRS ($00D7)
Serial communications interface and serial peripheral in-
terface subsystems and general-purpose I/O.
Port T
PT[7:0]
16–12, 9–7
In/Out
DDRT ($00AF)
General-purpose I/O when not enabled for input capture and
output compare in the timer and pulse accumulator sub-
system.
MOTOROLA
18
MC68HC912B32
MC68HC912B32TS/D