参数资料
型号: MC68HC08AS20CFN
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, MICROCONTROLLER, PQCC52
封装: PLASTIC, LCC-52
文件页数: 54/96页
文件大小: 3243K
代理商: MC68HC08AS20CFN
6
MOTOROLA
6-6
MC68HC05E0
PARALLEL INPUT/OUTPUT PORTS
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).
See Section 8 for detailed information on the Serial Interface.
Figure 6-3 Port D Structure
Table 6-3 Port E/SI Mode Selection
PS1
PS0
Function
PE0
PE1
PE2
0
PortE as parallel port
I/O
0
1
I2C bus protocol
data
clock
I/O
1
0
SPI function
data
clock
I/O
1
SPI function
data
I/O
clock
MUX
A15
A14
A13
LIR
CS3
CS2
R/W
P02
PD7
PD2
PD1
PD5
PD6
PD4
PD3
PD0
Port D
Data
Register
($0003)
Port D
Pads
V
DD
58
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