MC68HC05E0 Datasheet, PDF (58/96 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit

Port D
Data
Register
6
($0003)
V_DD
MUX
MUX
MUX
MUX
MUX
MUX
MUX
MUX
PD7
PD6
PD5
PD4 ^{Port D}
PD3 Pads
PD2
PD1
PD0
A15 A14 A13 LIR CS3 CS2 R/W P02
Figure 6-3 Port D Structure
6.4
Serial Interface Support Functions on Port E
Port E also supports the on-board Serial Interface (SPI and I2C functions) (see Figure 6-4).
Selection of these functions is controlled via the PS0 and PS1 bits in the Port E/SI Mode Register
($0010).
Table 6-3 Port E/SI Mode Selection
PS1
PS0
0
0
0
1
1
0
1
1
Function
PortE as parallel port
I²C bus protocol
SPI function
SPI function
PE0
PE1
PE2
I/O
I/O
I/O
data
clock
I/O
data
clock
I/O
data
I/O
clock
See Section 8 for detailed information on the Serial Interface.
MOTOROLA
6-6
PARALLEL INPUT/OUTPUT PORTS
MC68HC05E0