HD6413308 Hitachi Semiconductor, HD6413308 Datasheet - Page 239

• Manufacturer Part Number: HD6413308
• Description: Hitachi Single-Chip MicroComputer
• Manufacturer: Hitachi Semiconductor

Table 11-2. Dual-Port RAM Register Configuration (cont.)
Name
Parallel communication PCDR4 R/W
data register 4
Parallel communication PCDR5 R/W
data register 5
Parallel communication PCDR6 R/W
data register 6
Parallel communication PCDR7 R/W
data register 7
Parallel communication PCDR8 R/W
data register 8
Parallel communication PCDR9 R/W
data register 9
Parallel communication PCDR10 R/W
data register 10
Parallel communication PCDR11 R/W
data register 11
Parallel communication PCDR12 R/W
data register 12
Parallel communication PCDR13 R/W
data register 13
Parallel communication PCDR14 R/W
data register 14
Note: The H8/300 CPU can write only bits 6, 4, and 2 of the PCCSR. The master CPU can write
11.2 Register Descriptions
11.2.1 Dual Port RAM Enable Bit (DPME)
The dual-port RAM is enabled or disabled by the DPRAM Enable (DPME) bit in the system
control register (SYSCR). In the extended modes the dual-port RAM is always disabled. In the
single-chip mode, the dual-port RAM is initially disabled but can be enabled by setting the DPME
bit to "1."
only bit 4.
Abbr.
H8/300 Master Initial
CPU
Read/write
CPU
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
228
value
Undeter- H’FFF5
mined
Undeter- H’FFF6
mined
Undeter- H’FFF7
mined
Undeter- H’FFF8
mined
Undeter- H’FFF9
mined
Undeter- H’FFFA
mined
Undeter- H’FFFB
mined
Undeter- H’FFFC
mined
Undeter- H’FFFD
mined
Undeter- H’FFFE
mined
Undeter- H’FFFF
mined
On-chip
address RS
0
0
0
1
1
1
1
1
1
1
1
External address
3
RS
1
1
1
0
0
0
0
1
1
1
1
2
RS
0
1
1
0
0
1
1
0
0
1
1
1
RS
1
0
1
0
1
0
1
0
1
0
1
0