SH7032 Datasheet, PDF (136/687 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Section 8 Bus State Controller (BSC)
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
Description
Normal mode: External and internal accesses are not performed
simultaneously
(Initial value)
Warp mode: External and internal accesses are performed simultaneously
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
Description
RD signal high-level duty cycle is 50% of T1 state
RD signal high-level duty cycle is 35% of T1 state
(Initial value)
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
Description
WRH, WRL, and A0 enabled
LBS, WR, and HBS enabled
(Initial value)
Bits 10–0—Reserved: These bits are always read as 0. The write value should always be 0.
Rev. 7.00 Jan 31, 2006 page 110 of 658
REJ09B0272-0700