M16C6C Datasheet, PDF (87/94 Pages) Renesas Technology Corp – RENESAS MCU

M16C/6C Group
5. Electrical Characteristics
V_CC1 = V_CC2 = 3 V
5.3.5 Switching Characteristics (Memory Expansion Mode and Microprocessor
Mode (in 1 to 3 Waits Setting and When Accessing External Area))
(V_CC1 = V_CC2 = 3 V, V_SS = 0 V, at T_opr = -20 to 85°C/-40 to 85°C unless otherwise specified)
Table 5.55 Memory Expansion Mode and Microprocessor Mode (in 1 to 3 Waits Setting and When
Accessing External Area)
Symbol
t_d(BCLK-AD)
t_h(BCLK-AD)
t_h(RD-AD)
t_h(WR-AD)
t_d(BCLK-CS)
t_h(BCLK-CS)
t_d(BCLK-ALE)
t_h(BCLK-ALE)
t_d(BCLK-RD)
t_h(BCLK-RD)
t_d(BCLK-WR)
t_h(BCLK-WR)
t_d(BCLK-DB)
t_h(BCLK-DB)
t_d(DB-WR)
t_h(WR-DB)
t_d(BCLK-HLDA)
Parameter
Address output delay time
Address output hold time (in relation to BCLK)
Address output hold time (in relation to RD)
Address output hold time (in relation to WR)
Chip select output delay time
Chip select output hold time (in relation to BCLK)
ALE signal output delay time
ALE signal output hold time
RD signal output delay time
RD signal output hold time
WR signal output delay time
WR signal output hold time
Data output delay time (in relation to BCLK)
Data output hold time (in relation to BCLK) ⁽³⁾
Data output delay time (in relation to WR)
Data output hold time (in relation to WR) ⁽³⁾
HLDA output delay time
Measuring
Condition
Standard
Min.
Max.
Unit
30
ns
0
ns
0
ns
(Note 2)
ns
30
ns
0
ns
25
ns
-4
ns
See
Figure 5.17
30
ns
0
ns
30
ns
0
ns
40
ns
0
ns
(Note 1)
ns
(Note 2)
ns
40
ns
Notes:
1. Calculated according to the BCLK frequency as follows:
(_---n-----–_{----0----.-5----})_{---x---1---0----9-- – 40[ns]} n is 1 for 1 wait setting, 2 for 2 waits setting and 3 for 3 waits setting.
f_(BCLK)
When n = 1, f_(BCLK) is 12.5 MHz or less.
2. Calculated according to the BCLK frequency as follows:
0----.--5---x----1---0----9- _{– 10[ns]}
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_OL/V_CC2)
by a circuit of the right figure.
For example, when V_OL = 0.2V_CC2, C = 30 pF, R = 1 kΩ,
hold time of output low level is
t = −30 pF × 1 kΩ × In(1 − 0.2V_CC2/V_CC2)
= 6.7 ns.
R
DBi
C
REJ03B0277-0100 Rev.1.00 Jul.15, 2009
Page 85 of 90