MC68HC908AB32 MOTOROLA [Motorola, Inc], MC68HC908AB32 Datasheet - Page 326

• Manufacturer Part Number: MC68HC908AB32
• Description: HCMOS Microcontroller Unit
• Manufacturer: MOTOROLA [Motorola, Inc]

Input/Output (I/O) Ports
17.7 Port E
17.7.1 Port E Data Register (PTE)
Technical Data
326
Alternative Function:
Address:
Port E is an 8-bit special function port that shares two of its pins with the
timer interface module (TIMA), two of its pins with the serial
communications interface module (SCI) and four of its pins with the
serial peripheral interface module (SPI).
The port E data register contains a data latch for each of the eight port E
pins.
PTE[7:0] — Port E Data Bits
SPSCK — SPI Serial Clock
MOSI — Master Out/Slave In
Reset:
Read:
Write:
These read/write bits are software programmable. Data direction of
each port E pin is under the control of the corresponding bit in data
direction register E. Reset has no effect on port E data.
The PTE7/SPSCK pin is the serial clock input of a SPI slave module
and serial clock output of a SPI master modules. When the SPE bit is
clear, the PTE7/SPSCK pin is available for general-purpose I/O. See
16.14.1 SPI Control
The PTE6/MOSI pin is the master out/slave in terminal of the SPI
module. When the SPE bit is clear, the PTE6/MOSI pin is available for
general-purpose I /O. See
Freescale Semiconductor, Inc.
For More Information On This Product,
SPSCK
$0008
PTE7
Bit 7
Figure 17-15. Port E Data Register (PTE)
Go to: www.freescale.com
Input/Output (I/O) Ports
PTE6
MOSI
6
Register.
PTE5
MISO
5
16.14.1 SPI Control
Unaffected by reset
PTE4
SS
4
TACH1
PTE3
3
MC68HC908AB32
TACH0
PTE2
2
Register.
PTE1
RxD
1
MOTOROLA
—
Rev. 1.0
PTE0
Bit 0
TxD