參數(shù)資料
型號: UPD31172F1-48-FN
廠商: NEC Corp.
英文描述: VRC4172TM COMPANION CHIP FOR VR4121TM
中文描述: VRC4172TM伴侶芯片VR4121TM
文件頁數(shù): 29/44頁
文件大小: 278K
代理商: UPD31172F1-48-FN
Data Sheet U14388EJ2V0DS00
29
μ
PD31172
(c)
Serial transmission timing
RXD
(input)
IOW# (input)
(writing to THR
register)
IOR# (input)
(reading IIR
register)
INTRP
Note
(output)
t
IRS
DATA (5:8)
Start bit
Parity bit
Start bit
Stop bit
t
STI
t
IR
t
HR
t
SI
t
HR
Note
Dependant on whether the transmit buffer is empty. At this time, bit 1 of the IER register is 1, and bits 3
to 1 of the IIR register are 0, 0, 1, respectively.
(d)
Serial modem control timing
IOW# (input)
(writing to MCR
register)
RTS#, DTR#
(output)
CTS#, DSR#,
DCD# (input)
INTRP
Note
(output)
IOR# (input)
(reading MSR
register)
RI# (input)
t
MDO
t
SIM
t
SIM
t
RIM
t
RIM
t
SIM
t
MDO
Note
Dependant on the modem status. At this time, bit 3 of the IER register is 1, and bits 3 to 1 of the IIR
register are 0, 0, 0, respectively.
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