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32170/32174 Group User's Manual (Rev. 2.1)
16.3 Typical Operation of the Wait Controller
The following shows a typical operation of the wait controller. The wait controller can control bus
access in the range of 2 to 5 cycles. If more access cycles than that are needed, use the WAIT
function in combination with the wait controller.
(1) When Bus Mode Control Register = 0
___
External read/write operations are performed using the address bus, data bus, and signals CS0,
___ __ ___ ___ ____
CS1, RD, BHW, BLW, WAIT, and BCLK.
Figure 16.3.1 Internal Bus Access during Bus Free State
Note: THi-Z denotes a high-impedance state.
Bus-free state
internal bus access
"H"
BCLK
A11 - A30
CS0, CS1
BHW, BLW
DB0 - DB15
WAIT
RD
"H"
Hi-z
"H"
WAIT CONTROLLER
16.3 Typical Operation of the Wait Controller
