XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 359

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

MC68HC908AZ60A — Rev 2.0
MOTOROLA
When bit DDRBx is a logic 1, reading address $0001 reads the PTBx
data latch. When bit DDRBx is a logic 0, reading address $0001 reads
the voltage level on the pin. The data latch can always be written,
regardless of the state of its data direction bit.
the operation of the port B pins.
X = don’t care
Hi-Z = high impedance
1. Writing affects data register, but does not affect input.
DDRB
Bit
0
1
READ DDRB ($0005)
WRITE DDRB ($0005)
WRITE PTB ($0001)
READ PTB ($0001)
PTB
Bit
X
X
Input/Output Ports
Table 22-2. Port B Pin Functions
Figure 22-7. Port B I/O Circuit
RESET
Input, Hi-Z
I/O Pin
Output
Mode
DDRBx
PTBx
Read/Write
DDRB[7:0]
DDRB[7:0]
Accesses
to DDRB
Table 22-2
PTB[7:0]
Read
Accesses to PTB
Pin
Input/Output Ports
summarizes
Technical Data
PTB[7:0]
PTB[7:0]
Write
Port B
PTBx
(1)
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