MC68HC908AS60MFN MOTOROLA [Motorola, Inc], MC68HC908AS60MFN Datasheet - Page 314

• Manufacturer Part Number: MC68HC908AS60MFN
• Description: HCMOS Microcontroller Unit
• Manufacturer: MOTOROLA [Motorola, Inc]

Input/Output (I/O) Ports
20.7 Port E
20.7.1 Port E Data Register
Technical Data
314
Function:
Address:
Alternate
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 (PTE) contains a data latch for each of the eight
port E pins.
PTE[7:0] — Port E Data Bits
SPSCK — SPI Serial Clock Bit
MOSI — Master Out/Slave In Bit
Reset:
Read:
Write:
PTE[7:0] are read/write, software programmable bits. Data direction
of each port E pin is under the control of the corresponding bit in data
direction register E.
The PTE7/SPSCK pin is the serial clock input of an SPI slave module
and serial clock output of an SPI master module. When the SPE bit is
clear, the PTE7/SPSCK pin is available for general-purpose I/O.
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
Go to: www.freescale.com
Figure 20-14. Port E Data Register (PTE)
Input/Output (I/O) Ports
MOSI
PTE6
6
MISO
PTE5
5
18.14.1 SPI Control
Unaffected by reset
PTE4
SS
4
TACH1
PTE3
3
MC68HC908AS60 — Rev. 1.0
TACH0
PTE2
2
Register.)
PTE1
RxD
1
MOTOROLA
PTE0
Bit 0
TxD