r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 690

• Manufacturer Part Number: r5s77631ay266bgv
• Description: Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series
• Manufacturer: Renesas Electronics Corporation.

Section 15 External CPU Interface (EXCPU)
15.3.1
EXCCTRL indicates whether an external CPU is connected and sets the type of the external CPU.
Initial value:
Initial value:
Note: The initial value depends on the state of the MD10 pin.
Rev. 1.00 Oct. 01, 2007 Page 624 of 1956
REJ09B0256-0100
Bit
31 to 2 
1
0
R/W:
R/W:
Bit:
Bit:
Bit Name
EXCMD
EXCSEL
External CPU Control Register (EXCCTRL)
−
31
15
−
R
R
0
0
−
30
14
−
R
R
0
0
Initial
Value
All 0
Undefined* R
0
29
−
13
−
R
R
0
0
−
28
12
−
R
R
0
0
R/W
R
R/W
27
11
−
−
R
R
0
0
26
−
10
−
R
R
0
0
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
External CPU Connection Indicator
Indicates the state of the MD10 pin.
0: External CPU is not connected
1: External CPU is connected
External CPU Type
Selects the type of the CPU to be connected
0: SH7751 Group
1: SH7750 Group
25
−
−
R
R
0
9
0
24
−
−
R
R
0
8
0
23
−
−
R
R
0
7
0
22
−
−
R
R
0
6
0
21
−
R
−
R
0
5
0
20
−
−
R
R
0
4
0
19
−
−
R
R
0
3
0
18
−
−
R
R
0
2
0
EXC
17
CD
−
R
R
0
1
R/W
EXC
SEL
16
−
R
0
0
0