MC68HC708AS48 FREESCALE [Freescale Semiconductor, Inc], MC68HC708AS48 Datasheet - Page 193

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MC68HC708AS48

Manufacturer Part Number
MC68HC708AS48
Description
Advance Information
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
MC68HC708AS48
MOTOROLA
X = don’t care
Hi-Z = high impedance
1. Writing affects data register, but does not affect input.
DDRB
Bit
0
1
0
1
Rev. 4.0
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, or a logic 0 if that particular bit is in use by
the ADC. The data latch can always be written, regardless of the state
of its data direction bit.
B pins.
PTB
Bit
X
X
X
X
Table 15-2. Port B Pin Functions
selected
by ADC
Input/Output (I/O) Ports
Yes
Yes
Bit
No
No
Table 15-2
Input, Hi-Z
Input, Hi-Z
Input, Hi-Z
I/O Pin
Output
Mode
summarizes the operation of the port
Read/Write
DDRB[7:0]
DDRB[7:0]
DDRB[7:0]
DDRB[7:0]
Accesses
to DDRB
PTB[7:0]
PTB[7:0]
Read
Accesses to PTB
Pin
Input/Output (I/O) Ports
0
Advance Information
PTB[7:0]
PTB[7:0]
PTB[7:0]
PTB[7:0]
Write
Port B
(1)
(1)
193

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