MC68HC908AZ32ACFU MOTOROLA [Motorola, Inc], MC68HC908AZ32ACFU Datasheet - Page 369

• Manufacturer Part Number: MC68HC908AZ32ACFU
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

23.4 Port B
23.4.1 Port B Data Register
68HC908AZ32A — Rev 0.0
MOTOROLA
Functions:
Alternate
Address:
Port B is an 8-bit special function port that shares all of its pins with the
analog-to-digital converter.
The port B data register contains a data latch for each of the eight port
B pins.
PTB[7:0] — Port B Data Bits
X = don’t care
Hi-Z = high impedance
1. Writing affects data register, but does not affect input.
Reset:
Read:
Write:
Freescale Semiconductor, Inc.
DDRA
These read/write bits are software programmable. Data direction of
each port B pin is under the control of the corresponding bit in data
direction register B. Reset has no effect on port B data.
Bit
For More Information On This Product,
0
1
$0001
ATD7
PTB7
Bit 7
Go to: www.freescale.com
Figure 23-5. Port B Data Register (PTB)
PTA
Bit
X
X
ATD6
PTB6
6
Table 23-1. Port A Pin Functions
I/O Ports
Input, Hi-Z
ATD5
PTB5
I/O Pin
Output
Mode
5
Unaffected by Reset
ATD4
PTB4
4
Read/Write
DDRA[7:0]
DDRA[7:0]
Accesses
to DDRA
ATD3
PTB3
3
PTB2
ATD2
PTA[7:0]
2
Read
Accesses to PTA
Pin
Advance Information
PTB1
ATD1
1
PTA[7:0]
PTA[7:0]
Write
I/O Ports
PTB0
ATD0
Bit 0
Port B
(1)
369