参数资料
型号: MA28139
厂商: Dynex Semiconductor Ltd.
英文描述: OBDH Bus Terminal
中文描述: OBDH客运站
文件页数: 31/34页
文件大小: 416K
代理商: MA28139
MA28139
31/34
OBT CONTROL PIN LIST AND DESCRIPTIONS
No.
121
122
123
124
125
126
127
128
129
130
40
87
41
36
112
39
44
Name
TA0
TA1
TA2
TA3
TA4
TA5
EXTFMT
EXTMLA1
EXTMLA2
OOINH
TEST
SIMUL
CTpRTn
MRSTn
LOSC
TIMEOUTn
TAV
Type
I
I
I
I
I
I
I
I
I
I
I
I (PULL-DOWN)
I (PULL-UP)
I
(PULL-DOWN) (CSCHMITT)
I (CSCHMITT)
O
I (PULL-DOWN)
Description
Terminal Address bit 0 (MSB = I-bus bit 6)
Terminal Address bit 1
Terminal Address bit 2
Terminal Address bit 3
Terminal Address bit 4
Terminal Address bit 5
Extended format Enable
Extended Memory Load Address 1 Enable
Extended Memory Load Address 2 Enable
On/Off INHibit of MOLC commands
Tie to Ground (this input for test purposes only)
Simultaneously drive both busses
CT mode when high, RT mode when low
Master reset when low
Oscillator from user to drive OBT timeout
Low when I-bus timeout
Terminal available (take low to disable responses from RTU
kernal)
OBT POWER SUPPLY DISTRIBUTION PINS
No.
55, 113
14, 47, 80
Name
V
DD
V
SS
Type
P
P
Description
Positive supply nominally +5 volts. Connect both pins.
Power and signal ground. Connect all pins.
Notes:
1. CSCHMITT means CMOS Schmitt-trigger inputs.
2. Internal pull-up or pull-down resistors should not be relied upon for proper operation and/or termination of input levels
under all operating conditions without prior consultation with GPS.
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