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M306NKT-EPB User’s Manual 4. Hardware Specifications
REJ10J0519-0200 Rev.2.00 Oct. 16, 2006 Page 74 of 104
(2) Multiplex Bus Timing
Table 4.3 and Figure 4.2 show the bus timing in memory expansion mode and microprocessor mode (2-wait, accessing
external area, using multiplex bus).
Table 4.3 Memory expansion mode and microprocessor mode (2-wait, accessing external area, using multiplex bus)
Actual MCU
[ns]
This product
[ns]
Symbol Item
Min. Max. Min. Max.
td(BCLK-AD)
Address output delay time 25 See left
th(BCLK-AD)
Address output hold time (BCLK standard) 4 See left
th(RD-AD)
Address output hold time (RD standard) (*1) See left
th(WR-AD)
Address output hold time (WR standard) (*1) See left
td(BCLK-CS)
Chip-select output delay time 25 See left
th(BCLK-CS)
Chip-select output hold time (BCLK standard) 4 See left
th(RD-CS)
Chip-select output hold time (RD standard) (*1) See left
th(WR-CS)
Chip-select output hold time (WR standard) (*1) See left
td(BCLK-RD)
RD signal output delay time 25 See left
th(BCLK-RD)
RD signal output hold time 0 See left
td(BCLK-WR)
WR signal output delay time 25 See left
th(BCLK-WR)
WR signal output hold time 0 See left
td(BCLK-DB)
Data output delay time (BCLK standard) 40 See left
th(BCLK-DB)
Data output hold time (BCLK standard) 4 See left
td(DB-WR)
Data output delay time (WR standard) (*2) See left
th(WR-DB)
Data output hold time (WR standard) (*1) See left
td(BCLK-ALE)
ALE output delay time (BCLK standard) 25 See left
th(BCLK-ALE)
ALE output hold time (BCLK standard) -4 See left
td(AD-ALE)
ALE output delay time (Address standard) (*3) See left
th(ALE-AD)
ALE output hold time (Address standard) (*4) See left
td(AD-RD)
After address RD signal output delay time 0 See left
td(AD-WR)
After address WR signal output delay time 0 See left
tdz(RD-AD)
Address output floating start time 8 15
*1 Calculated by the following formula according to the frequency of BCLK.
10
)(
105.0
9
−
×
BCLKf
[ns]
*2 Calculated by the following formula according to the frequency of BCLK.
()
40
)(
105.0
9
−
×−
BCLKf
n
[ns] n: "2" for 2 wait
*3 Calculated by the following formula according to the frequency of BCLK.
25
)(
105.0
9
−
×
BCLKf
[ns]
*4 Calculated by the following formula according to the frequency of BCLK.
15
)(
105.0
9
−
×
BCLKf
[ns]