SH7709S Datasheet, PDF (279/807 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series

IC Memory Card Interface
Pin Signal
I/O Function
61 REG
I Attribute memory
space select
62 BVD2
O Battery voltage
detection
63 BVD1
O Battery voltage
detection
64 D8
I/O Data
65 D9
I/O Data
66 D10
I/O Data
67 CD2
O Card detection
68 GND
Ground
Signal
REG
SPKR
I/O Card Interface
I/O Function
SH7709S Pin
I Attribute memory —
space select
O Digital voice signal —
STSCHG O Card state
—
change
D8
I/O Data
D8
D9
I/O Data
D9
D10
I/O Data
D10
CD2
O Card detection —
GND
Ground
—
10.2 BSC Registers
10.2.1 Bus Control Register 1 (BCR1)
Bus control register 1 (BCR1) is a 16-bit readable/writable register that sets the functions and bus
cycle state for each area. It is initialized to H'0000 by a power-on reset, but is not initialized by a
manual reset or in standby mode. Do not access external memory outside area 0 until BCR1
register initialization is complete.
Bit:
Initial value:
R/W:
15
PULA
0
R/W
14
13
12
11
10
9
8
PULD HIZMEM HIZCNT ENDIAN A0BST1 A0BST0 A5BST1
0
0
0
0/1*
0
0
0
R/W R/W R/W
R
R/W R/W R/W
Bit: 7
6
5
4
3
2
1
0
A5BST0 A6BST1 A6BST0 DRAM DRAM DRAM A5 PCM A6 PCM
TP2
TP1
TP0
Initial value: 0
0
0
0
0
0
0
0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W
Note: * Samples the value of the external pin (MD5) designating the endian in a power-on reset.
Rev. 5.00, 09/03, page 235 of 760