CHAPTER 5 MEMORY ACCESS CONTROL FUNCTION
144
User’s Manual U14359EJ4V0UM
5.1.3 SRAM, external ROM, external I/O access
Figure 5-2. SRAM, External ROM, External I/O Access Timing (1/6)
(a) When read
T1
T2
Address
Data
WAIT (input)
D0 to D15 (I/O)
IOWR (output)
IORD (output)
Note
LWR/LCAS (output)
UWR/UCAS (output)
WE (output)
OE (output)
RD (output)
CSn/RASm (output)
LBE (output)
UBE (output)
BCYST (output)
A0 to A25 (output)
CLKOUT (output)
Data
Address
TW
T2
T1
Note
When the IOEN bit of the BCP register is set to 1.
Remarks 1.
The
circle
{
indicates the sampling timing.
2.
The broken lines indicate the high-impedance state.
3.
n = 0 to 7, m = 1, 3, 4, 6