XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 366

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

Input/Output Ports
22.7 Port E
22.7.1 Port E Data Register
Technical Data
366
Function:
Alternate
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 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. (See
SPI Control Register
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.
SPSCK
$0008
PTE7
Bit 7
Figure 22-14. Port E Data Register (PTE)
Input/Output Ports
PTE6
MOSI
6
PTE5
MISO
on page 310).
5
Unaffected by Reset
PTE4
SS
4
TACH1
PTE3
3
MC68HC908AZ60A — Rev 2.0
TACH0
PTE2
2
PTE1
RxD
1
MOTOROLA
PTE0
Bit 0
TxD