XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 365

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

MC68HC908AZ60A — Rev 2.0
MOTOROLA
When bit DDRDx is a logic 1, reading address $0003 reads the PTDx
data latch. When bit DDRDx is a logic 0, reading address $0003 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 D pins.
X = don’t care
Hi-Z = high impedance
1. Writing affects data register, but does not affect input.
DDRD
Bit
0
1
READ DDRD ($0007)
WRITE DDRD ($0007)
WRITE PTD ($0003)
READ PTD ($0003)
PTD
Bit
X
X
Input/Output Ports
Input, Hi-Z
I/O Pin
Output
Table 22-4. Port D Pin Functions
Mode
Figure 22-13. Port D I/O Circuit
RESET
Accesses to
Read/Write
DDRD[7:0]
DDRD[7:0]
DDRD
DDRDx
PTDx
PTD[7:0]
Table 22-4
Read
Pin
Accesses to PTD
Input/Output Ports
summarizes
Technical Data
PTD[7:0]
PTD[7:0]
Write
Port D
(1)
PTDx
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