MC68HC708MP16CFU

Manufacturer Part NumberMC68HC708MP16CFU
ManufacturerFreescale Semiconductor, Inc
MC68HC708MP16CFU datasheet
 


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Page 330/398:

Port F

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Input/Output (I/O) Ports
When bit DDREx is a logic 1, reading address $0004 reads the PTEx
data latch. When bit DDREx is a logic 0, reading address $0004 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 E pins.
DDRE
Bit
0
1
1. X = don’t care
2. Hi-Z = high impedance
3. Writing affects data register, but does not affect input.
15.8 Port F
Port F is a 6-bit special function port that shares four of its pins with the
serial peripheral interface module (SPI) and two pins with the serial
communications interface (SCI).
15.8.1 Port F Data Register
The port F data register (PTF) contains a data latch for each of the six
port F pins.
Address:
Read:
Write:
Reset:
Technical Data
330
Table 15-5. Port E Pin Functions
Accesses to
PTE
DDRE
I/O Pin Mode
Bit
Read/Write
(1)
(2)
X
Input, Hi-Z
DDRE[7:0]
X
Output
DDRE[7:0]
$0005
Bit 7
6
5
4
0
0
PTF5
PTF4
Unaffected by reset
= Unimplemented
Figure 15-16. Port F Data Register (PTF)
Input/Output (I/O) Ports
Table 15-3
summarizes
Accesses to PTE
Read
Write
(3)
Pin
PTE[7:0]
PTE[7:0]
PTE[7:0]
3
2
1
Bit 0
PTF3
PTF2
PTF1
PTF0
MC68HC708MP16
Rev. 3.1
Freescale Semiconductor