Renesas M32R/ECU Series, User Manual

Page: 698 / 839

16
16-21
WAIT CONTROLLER
16.3 Typical Operation of the Wait Controller
32180 Group User’s Manual (Rev.1.0)
Figure 16.3.16 Read/Write Timing (for Access with Internal 2 and External n Wait States)
Read Read (3 + n cycles)
BCLK
A11–A30
CS0#–CS3#
BHE#, BLE#
DB0–DB15
WAIT#
RD#
"H"
Note 1: For details about the Bus Mode Control Register, see Section 15.2.3, "Bus Mode Control Register."
Note 2: For details about the CS Area Wait Control Register, see Section 16.2.1, "CS Area Wait Control Registers."
Notes: • Circles in the above diagram indicate the sampling timing.
• BCLK is not output.
"L"
Internal 2 wait states External n wait states
(Don't Care)
"H"
(Don't Care)
Write
Write (3 + n cycles)
BCLK
A11–A30
CS0#–CS3#
BHE#, BLE#
DB0–DB15
WAIT#
RD#
"H"
"L"
Internal 2 wait states External n wait states
(Don't Care)
"H"
(Don't Care)
"L" "L"
"L" "L"
WR#
WR#
Bus Mode Control Register (Note 1)
BUSMOD bit = 1 (byte enable separated)
CS Area Wait Control Register (Note 2)
WTCSEL bit = 010 (2 wait)
SWAIT bit = 0 (without strobe wait)
RECOV bit = 0 (without recovery cycle)
IDLE bit = 0 (without idle cycle)