10.4.6 Summary of Device Operating Modes
Table 2 shows a summary of the operating modes for the SN65HVD230 and SN65HVD231. Please note that the SN65HVD232 is a basic CAN transceiver has only the normal high speed mode of operation; pins 5 and 8 are no connection (NC).
Table 2. SN65HVD230 and SN65HVD231 Operating Modes
RS Pin |
MODE |
DRIVER |
RECEIVER |
RXD Pin |
LOW, V(Rs)< 1.2 V, strong pull down to GND |
High Speed Mode |
Enabled (ON) High Speed |
Enabled (ON) |
Mirrors Bus State(1)
|
LOW, V(Rs)< 1.2 V, 10 kΩ to 100 kΩ pull down to GND |
Slope Control Mode |
Enabled (ON) with Slope Control |
Enabled (ON) |
Mirrors Bus State |
HIGH, V(Rs)> 0.75 VCC
|
Low Current Mode |
SN65HVD230: Standby Mode |
Disabled (OFF) |
Enabled (ON) |
Mirrors Bus State |
SN65HVD231: Sleep Mode |
Disabled (OFF) |
High |
(1) Mirrors bus state: low if CAN bus is dominant, high if CAN bus is recessive.
Table 3. SN65HVD230 and SN65HVD231 Driver Functions
DRIVER (SN65HVD230, SN65HVD231)(1)
|
INPUT D |
RS
|
OUTPUTS |
BUS STATE |
CANH |
CANL |
L |
V(Rs)< 1.2 V (including 10 kΩ to 100 kΩ pull down to GND) |
H |
L |
Dominant |
H |
Z |
Z |
Recessive |
Open |
X |
Z |
Z |
Recessive |
X |
V(Rs)> 0.75 VCC
|
Z |
Z |
Recessive |
(1) H = high level; L = low level; X = irrelevant; ? = indeterminate; Z = high impedance
Table 4. SN65HVD230 Receiver Functions
RECEIVER (SN65HVD230)(1)
|
DIFFERENTIAL INPUTS |
RS
|
OUTPUT R |
VID ≥ 0.9 V |
X |
L |
0.5 V < VID< 0.9 V |
X |
? |
VID ≤ 0.5 V |
X |
H |
Open |
X |
H |
(1) H = high level; L = low level; X = irrelevant; ? = indeterminate
Table 5. SN65HVD231 Receiver Functions
RECEIVER (SN65HVD231)(1)
|
DIFFERENTIAL INPUTS |
RS
|
OUTPUT R |
VID ≥ 0.9 V |
V(Rs)< 1.2 V (including 10 kΩ to 100 kΩ pull down to GND) |
L |
0.5 V < VID< 0.9 V |
? |
VID ≤ 0.5 V |
H |
X |
V(Rs)> 0.75 VCC
|
H |
X |
1.2 V < V(Rs)< 0.75 VCC
|
? |
Open |
X |
H |
(1) H = high level; L = low level; X = irrelevant; ? = indeterminate
Table 6. SN65HVD232 Receiver Functions
RECEIVER (SN65HVD232)(1)
|
DIFFERENTIAL INPUTS |
OUTPUT R |
VID ≥ 0.9 V |
L |
0.5 V < VID< 0.9 V |
? |
VID ≤ 0.5 V |
H |
Open |
H |
(1) H = high level; L = low level; X = irrelevant; ? = indeterminate
Table 7. SN65HVD232 Driver Functions
DRIVER (SN65HVD232)(1)
|
INPUT D |
OUTPUTS |
BUS STATE |
CANH |
CANL |
L |
H |
L |
Dominant |
H |
Z |
Z |
Recessive |
Open |
Z |
Z |
Recessive |
(1) H = high level; L = low level; Z = high impedance