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Chapter 14
FCAN Interface Function
Preliminary User’s Manual U15839EE1V0UM00
(4)
CAN global interrupt enable register (CGIE)
The CGIE register enables the global interrupts of the FCAN system.
This register can be read in 1-bit, 8-bit and16-bit units. It can be written in 16-bit units only. For set-
ting and clearing certain bits a special set/clear method applies. (Refer to 14.3.1 “Bit set/clear
function” on page 452)
Figure 14-13:
CAN Global Interrupt Enable Register (CGIE) (1/2)
Read
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Address
Offset
Note
Initial
value
CGIE
0
0
0
0
1
0
0
01 G_IE7
0
0
0
0
G_IE2 G_IE1
0
1012H
0000H
Write
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
CGIE
ST_
G_IE7
0
0
0
0
ST_
G_IE2
ST_
G_IE1
0
CL_
G_IE7
0
0
0
0
CL_
G_IE2
CL_
G_IE1
0
1012H
Read
Bit Position
Bit Name
Function
7
G_IE7
Enables interrupt by CAN bridge.
0: Interrupt disabled
1: Interrupt enabled
Remark:
Due to the reason that no CAN bridge is implemented in the V850E/CA2
device, this bit must not be set at any time.
2
G_IE2
Enables illegal address interrupt.
0: Interrupt disabled
1: Interrupt enabled
Remarks: 1. Interrupt signals any access to CAN module register while GOM bit of
the CGST register is reset (0).
2. Interrupt signals a write access to the temporary buffer while GOM bit
of the CGST register is set (1).
1
G_IE1
Enables “access to unavailable memory addresses” interrupt.
0: Interrupt disabled
1: Interrupt enabled
Remarks: 1. Interrupt signals an access to any CAN memory area not explicitly
specified.
2. Interrupt signals an illegal FCAN system shut down, i.e. GOM bit is
going to be cleared while at least one of the CAN modules is not in ini-
tialisation state or “forced shut down” is not selected.
Note: The register address is calculated according to the following formula:
effective address = P address offset
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