232
10.1.4
Register Configuration
The BSC has 21 registers (table 10.2). Synchronous DRAM also has a built-in synchronous
DRAM mode register. These registers control direct connection interfaces to memory, wait states,
and refreshes devices.
Table 10.2
BSC Registers
Name
Abbr.
R/W
Initial Value
*
1
Address
Bus Width
Bus control register 1
BCR1
R/W
H'0000
H'FFFFFF60
16
Bus control register 2
BCR2
R/W
H'3FF0
H'FFFFFF62
16
Wait state control register 1
WCR1
R/W
H'3FF3
H'FFFFFF64
16
Wait state control register 2
WCR2
R/W
H'FFFF
H'FFFFFF66
16
Individual memory control
register
MCR
R/W
H'0000
H'FFFFFF68
16
PCMCIA control register
PCR
R/W
H'0000
H'FFFFFF6C
16
Refresh timer control/status
register
RTCSR
R/W
H'0000
H'FFFFFF6E
16
Refresh timer counter
RTCNT
R/W
H'0000
H'FFFFFF70
16
Refresh time constant register
RTCOR
R/W
H'0000
H'FFFFFF72
16
Refresh count register
RFCR
R/W
H'0000
H'FFFFFF74
16
Synchronous DRAM mode
register, area 2
SDMR
W
—
H'FFFFD000–
H'FFFFDFFF
8
Synchronous DRAM mode
register, area 3
H'FFFFE000–
H'FFFFEFFF
MCS0 control register
MCSCR0
R/W
H'0000
H'FFFFFF50
16
MCS1 control register
MCSCR1
R/W
H'0000
H'FFFFFF52
16
MCS2 control register
MCSCR2
R/W
H'0000
H'FFFFFF54
16
MCS3 control register
MCSCR3
R/W
H'0000
H'FFFFFF56
16
MCS4 control register
MCSCR4
R/W
H'0000
H'FFFFFF58
16
MCS5 control register
MCSCR5
R/W
H'0000
H'FFFFFF5A
16
MCS6 control register
MCSCR6
R/W
H'0000
H'FFFFFF5C
16
MCS7 control register
MCSCR7
R/W
H'0000
H'FFFFFF5E
16
Notes:
*
1 Initialized by a power-on reset.
2. For details, see section 10.2.7, Synchronous DRAM Mode Register.
Содержание SH7709S
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