參數資料
型號: 37C672
廠商: SMSC Corporation
英文描述: ENHANCED SUPER I/O CONTROLLER WITH FAST IR
中文描述: 增強的超級I / O控制器,快速紅外線
文件頁數: 110/173頁
文件大小: 965K
代理商: 37C672
3802 GROUP USER’S MANUAL
1-26
HARDWARE
Serial I/O2
The serial I/O2 function can be used only for clock synchronous
serial I/O.
For clock synchronous serial I/O the transmitter and the receiver
must use the same clock. If the internal clock is used, transfer is
started by a write signal to the serial I/O2 register.
Serial I/O2 control register (SIO2CON) 001D16
The serial I/O2 control register contains seven bits which control
various serial I/O functions.
Fig. 23 Structure of serial I/O2 control register
Fig. 24 Block diagram of serial I/O2 function
FUNCTIONAL DESCRIPTION
XIN
"1"
"0"
"1"
"0"
"1"
SRDY2
S
CLK2
"0"
"1"
1/8
1/16
1/32
1/64
1/128
1/256
Data bus
Serial I/O2
interrupt request
Serial I/O2 port selection bit
Serial I/O counter 2 (3)
Serial I/O shift register 2 (8)
Synchronization circuit
Serial I/O2 port selection bit
Serial I/O2 synchronous
clock selection bit
SRDY2 output enable bit
External clock
Internal synchronous
clock selection bits
Divider
P53 latch
P53/SRDY2
P52/SCLK2
P51/SOUT2
P50/SIN2
P52 latch
P51 latch
Serial I/O2 control register
(SIO2CON : address 001D16)
b7
Internal synchronous clock selection bits
0 0 0: f(XIN)/8
0 0 1: f(XIN)/16
0 1 0: f(XIN)/32
0 1 1: f(XIN)/64
1 1 0: f(XIN)/128
1 1 1: f(XIN)/256
Serial I/O2 port selection bit (SM23)
0: I/O port
1: SOUT2,SCLK2 output pin
SRDY2 output enable bit (SM24)
0: I/O port
1: SRDY2 output pin
Transfer direction selection bit (SM25)
0: LSB first
1: MSB first
Serial I/O2 synchronous clock selection bit (SM26)
0: External clock
1: Internal clock
P51/SOUT2 P-channel output disable bit
0: CMOS output (in output mode)
1: N-channel open-drain output (in output mode)
b0
b2 b1 b0
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