st92f120 STMicroelectronics, st92f120 Datasheet - Page 308

• Manufacturer Part Number: st92f120
• Description: 8/16-bit Flash Mcu Family With Ram, Eeprom And J1850 Blpd
• Manufacturer: STMicroelectronics

ST92F120 - ELECTRICAL CHARACTERISTICS
J1850 BYTE LEVEL PROTOCOL DECODER TIMING TABLE
(V
Note:
(1) Values obtained with internal frequency at 24 MHz (INTCLK), with CLKSEL Register set to 23.
(2) In Transmission Mode, symbol durations are compliant to nominal values defined by the J1850 Protocol Specifications.
(3) All values are reported with a precision of 1 s.
J1850 PROTOCOL TIMING
308/324
1
T
T
T
T
T
T
T
T
T
T
T
T
T
Symbol
DD
F
IB
P0
A0
P1
A1
NBS
NBL
SOF
EOD
EOF
BRK
IDLE
= 5V
VPWO
VPWO
Symbols Filtered
Invalid Bit Detected
Passive Data Bit “0”
Active Data Bit “0”
Passive Data Bit “1”
Active Data Bit “1”
Short Normalization Bit
Long Normalization Bit
Start Of Frame Symbol
End Of Data Symbol
End Of Frame Symbol
Break Symbol
Idle Symbol
10%, T
A
T
T
SOF
SOF
=
–
Parameter
40° C to +105° C, C
T
T
P0
P0
T
T
A0
A0
T
T
P1
P1
T
T
A1
A1
Load
= 50pF, f
> 163
> 163
> 239
> 239
> 280
Receive Mode
Min
> 34
> 96
> 96
> 34
> 34
> 96
> 7
0
INTCLK
T
T
Max
EOD
EOD
163
163
163
239
239
34
96
96
96
-
-
-
7
Value
T
= 24MHz, unless otherwise specified)
NBS
T
NBL
Transmission Mode
Nominal
128
128
128
200
200
280
300
300
64
64
64
-
-
T
T
T
T
EOF
EOF
IDLE
IDLE
Unit
s
s
s
s
s
s
s
s
s
s
s
s
s
(1)(2)(3)
(1)(2)(3)
(1)(2)(3)
(1)(2)(3)
(1)(2)(3)
(1)(2)(3)
(1)(2)(3)
(1)(2)(3)
(1)(2)(3)
(1)(2)(3)
(1)(2)(3)
Note
(1)(2)
(1)(2)