Hitachi SH7032 Hardware Manual page 143

• Bit 13 (Warp Mode Bit (WARP)): WARP selects warp or normal mode. 0 sets normal mode
and 1 sets warp mode. In warp mode, some external accesses are carried out in parallel with
internal access.
Bit 13: WARP
0
1
• Bit 12 (RD Duty (RDDTY)): RDDTY selects 35% or 50% of the T1 state as the high-level
duty cycle ratio of signal RD. 0 sets 50%, 1 sets 35%.
Bit 12: RDDTY
0
1
• Bit 11 (Byte Access Select (BAS)): BAS selects whether byte access control signals are WRH,
WRL, and A0, or LBS, WR and HBS during word space accesses. When this bit is cleared to
0, WRH, WRL, and A0 signals are valid; when set to 1, LBS, WR, and HBS signals are valid.
Bit 11: BAS
0
1
• Bits 10–0 (Reserved): These bits are always read as 0. The write value should always be 0.
108
Description
Normal mode: External and internal accesses are not performed
simultaneously
Warp mode: External and internal accesses are performed
simultaneously
Description
RD signal high-level duty cycle is 50% of T1 state
RD signal high-level duty cycle is 35% of T1 state
Description
WRH, WRL, and A0 enabled
LBS, WR, and HBS enabled
(Initial value)
(Initial value)
(Initial value)