参数资料
型号: S5N8947X
厂商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: MCU for ADSL/Cable Modem
中文描述: 单片机为ADSL / Cable Modem的
文件页数: 32/49页
文件大小: 407K
代理商: S5N8947X
S5N8947 (ADSL/Cable Modem MCU)
ELECTRONICS
MagIC Team
Page : 32
SAMSUNG ELECTRONICS
6.10. I/O Ports
The S5N8947 has 18 programmable I/O ports. You can configure each I/O port to input mode,
output mode, or special function mode. To do this, you write the appropriate settings to the IOPMOD and
IOPCON registers. User can set filtering for the input ports using IOPCON register.
The modes of the ports from port0 to port7 are determined only by the IOPMOD register. But
port[11:8] can be used as xINTREQ[3:0], port[13:12] as nXDREQ[1:0], port[15:14] as nXDACK[1:0],
port[16] as TOUT0, or port[17] as TOUT1 depending on the settings in IOPCON register.
S
Output
Latch
Input
Latch
Active
On/Off &
Edge
Detection
IOPDATA
(Read)
Interrupt or DMA
Request
IOPCON
Filter
On/Off
IOPCON
IOPDATA
(Write)
Alternate Functions
IOPCON
V
DD
IOPMOD
Port0 - Port7
Port8/xINTREQ0
Port11/xINTREQ3
Port12/nXDREQ0
Port13/nXDREQ1
Port14/nXDACK0
Port15/nXDACK1
Port16/TOUT0
Port17/TOUT1
Figure 13 I/O port function diagram
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