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M16C/6N Group (M16C/6NK, M16C/6NM)
Switching Characteristics
(Referenced to VCC = 5V, VSS = 0 V, at Topr = –40 to 85 °C unless otherwise specified)
Table 22.26 Memory Expansion Mode and Microprocessor Mode (for 1- to 3-wait setting and external area access)
Symbol
t
Address output delay time
d(BCLK-AD)
t
Address output hold time (refers to BCLK)
h(BCLK-AD)
t
Address output hold time (refers to RD)
h(RD-AD)
t
Address output hold time (refers to WR)
h(WR-AD)
t
Chip select output delay time
d(BCLK-CS)
t
Chip select output hold time (refers to BCLK)
h(BCLK-CS)
t
ALE signal output delay time
d(BCLK-ALE)
t
ALE signal output hold time
h(BCLK-ALE)
t
RD signal output delay time
d(BCLK-RD)
t
RD signal output hold time
h(BCLK-RD)
t
WR signal output delay time
d(BCLK-WR)
t
WR signal output hold time
h(BCLK-WR)
t
Data output delay time (refers to BCLK)
d(BCLK-DB)
t
Data output hold time (refers to BCLK)
h(BCLK-DB)
t
Data output delay time (refers to WR)
d(DB-WR)
t
Data output hold time (refers to WR)
h(WR-DB)
__________
t
HLDA output delay time
d(BCLK-HLDA)
NOTES:
1. Calculated according to the BCLK frequency as follows:
0.5 ✕ 10
9
– 10 [ns]
f(BCLK)
2. Calculated according to the BCLK frequency as follows:
(n – 0.5) ✕ 10
f(BCLK)
3. This standard value shows the timing when the
output is off, and does not show hold time of
data bus.
Hold time of data bus varies with capacitor volume
and pull-up (pull-down) resistance value.
Hold time of data bus is expressed in
t = – CR ✕ ln (1 – V
by a circuit of the right figure.
For example, when V
R =1 kΩ, hold time of output "L" level is
t = – 30 pF ✕ 1 kΩ ✕ ln (1 – 0.2 V
Rev.2.00
Nov 28, 2005
REJ09B0124-0200
Parameter
9
n is "1" for 1-wait setting, "2" for 2-wait setting and "3" for 3-wait setting.
– 40 [ns]
When n = 1, f(BCLK) is 12.5 MHz or less.
/ V
)
OL
CC
= 0.2 V
, C = 30 pF,
OL
CC
/ V
) = 6.7 ns..
CC
CC
page 303 of 378
22. Electric Characteristics (Normal-ver.)
Measuring
condition
Figure 22.3
(3)
(3)
VCC = 5V
Standard
Min.
Max.
25
4
0
(NOTE 1)
25
4
15
–4
25
0
25
0
40
4
(NOTE 2)
(NOTE 1)
40
R
DBi
C
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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