Filter
Top Products
M306NKT-EPB User’s Manual 4. Hardware Specifications
REJ10J0519-0200 Rev.2.00 Oct. 16, 2006 Page 72 of 104
4.2 Access Timing
Because this product emulates some ports, access timings are different from those of the actual MCUs. Chapters 4.2.1
(Vcc=5V) and 4.2.2 (Vcc=3V) describe the access timing using this product.
4.2.1 Operation Timing of Memory Expansion Mode and Microprocessor Mode (Vcc=5V)
(1) Separate Bus Timing
Table 4.2 and Figure 4.1 show the bus timing in memory expansion mode and microprocessor mode (3-wait, accessing
external area).
Table 4.2 Memory expansion mode and microprocessor mode (3-wait, accessing external area)
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) 0 -2
th(WR-AD)
Address output hold time (WR standard) (*2) 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
td(BCLK-ALE)
ALE signal output delay time 25 See left
th(BCLK-ALE)
ALE signal output hold time -4 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 27
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) (*1) See left
th(WR-DB)
Data output hold time (WR standard) (*2) See left
*1 Calculated by the following formula according to the frequency of BCLK.
()
40
)(
105.0
9
−
×−
BCLKf
n
[ns] n: "3" for 3 wait
*2 Calculated by the following formula according to the frequency of BCLK.
10
)(
105.0
9
−
×
BCLKf
[ns]