參數(shù)資料
型號(hào): 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(yè)數(shù): 26/44頁(yè)
文件大?。?/td> 278K
代理商: UPD31172F1-48-FN
Data Sheet U14388EJ2V0DS00
26
μ
PD31172
(8)
PS/2 parameters
Parameter
Symbol
Conditions
MIN.
MAX.
Unit
PS2CLK clock high-level width
t
PSCH
3 T
ns
PS2CLK clock low-level width
t
PSCL
3 T
ns
PS2CLK output delay time
t
PSO
T + 20
ns
Transmission start time
t
PSGO
20
ns
Transmit data output delay time
t
PSDO
3 T + 20
ns
Receive data setup time
t
PSDS
0
ns
Receive data hold time
t
PSDH
4 T
ns
Receive disable setup time
t
PSN
3 T
ns
Remark
T = 125 ns (cycle of internal clock for controlling PS/2)
(a)
Transmission
t
PSO
t
PSO
t
PSCL
t
PSCH
PS2CLK
(I/O)
IOW#
(input)
PS2DATA
(I/O)
t
PSDO
t
PSGO
DATA0
DATA (1:7),
parity bit
Stop bit
Start bit
Input
Input
Output
Input
Input
Output
PS/2 interface
enabled
PS/2 interface
disabled
Transmit data
setting
(b)
Reception
t
PSCL
PS2CLK
(I/O)
PS2DATA
(I/O)
t
PSN
t
PSDH
t
PSDS
DATA0
DATA (1:7),
parity bit
Stop bit
Start bit
Input
Output
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