参数资料
型号: EM6603SO24B
英文描述: Microcontroller
中文描述: 微控制器
文件页数: 6/39页
文件大小: 675K
代理商: EM6603SO24B
EM6603
03/02 REV. G/439
Copyright
2002, EM Microelectronic-Marin SA
14
www.emmicroelectronic.com
6.7 PortD
The EM6603 has one all purpose I/O port similar to PortC but without interrupt capability. The PortD register is
used to read input data when an input and to write output data for output. The input line can be pulled Up/Down
(metal option) when the port is used as input. Input mode is set by writing 0 to the I/O control bit CIOPD in
register CPIOB, and the terminal becomes high impedance. On each terminal Pull-Up/Down resistor can be
selected by metal option which are active only when selected as input.
Output mode is set by writing 1 to the control bit CIOPD. Consequently, the terminal follows the status of the bits
in the PortD register. If Serial Write Buffer function is enabled PD0 and PD1 terminals of PortD output serial
clock and serial data respectively. For details see 11.0 Serial Write Buffer.
6.8 PortD registers
Table 20.PortD Input/Output register - PortD
Bit
Name
Reset
R/W
Description
3
PD3
0
R/W
PD3 I/O data
2
PD2
0
R/W
PD2 I/O data
1
PD1
0
R/W
PD1 I/O data
0
PD0
0
R/W
PD0 I/O data
Table 21.Ports control register - CPIOB
Bit
Name
Reset
R/W
Description
3
-
R/W
not used
2
CIOPD
0
R/W
I/O PortD select
1
CIOPC
0
R/W
I/O PortC select
0
PA&C
0
R/W
Logical AND of IRQ’s from PortA & PortC
Figure 9.Port D
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