UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 569

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(b) Write
Caution To request forced shutdown, the GOM bit must be cleared to 0 in a subsequent,
Caution The GOM bit can be cleared only in the initialization mode or immediately after
Caution Set GOM bit and ESFD bit always separately.
EFSD
GOM
Set EFSD
Set GOM
0
1
0
1
0
1
0
1
Other than above
immediately following write access after the EFSD bit has been set to 1. If access
to another register (including reading the C0GMCTRL register) is executed
without clearing the GOM bit immediately after the EFSD bit has been set to 1,
the EFSD bit is forcibly cleared to 0, and the forced shutdown request is invalid.
EFSD bit is set (to 1).
Forced shut down by GOM = 0 disabled.
Forced shut down by GOM = 0 enabled.
CAN module is disabled from operating.
CAN module is enabled to operate.
No change in ESFD bit .
EFSD bit set to 1.
Clear GOM
1
0
Preliminary User’s Manual U19748EJ1V0UD
CHAPTER 15 CAN CONTROLLER
GOM bit cleared to 0.
GOM bit set to 1.
No change in GOM bit.
Bit Enabling Forced Shut Down
Global Operation Mode Bit
EFSD Bit Setting
GOM Bit Setting
567