HD6432670 Hitachi, HD6432670 Datasheet - Page 887

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Clock Timing
Table 24.5 Clock Timing
Conditions: V
Item
Clock cycle time
Clock pulse high width
Clock pulse low width
Clock rise time
Clock fall time
Reset oscillation stabilization time
(crystal)
Software standby oscillation
stabilization time (crystal)
External clock output delay
stabilization time
Clock phase difference*
Clock pulse high width (SDRAM )*
Clock pulse low width (SDRAM )*
Clock rise time (SDRAM )*
Clock fall time (SDRAM )*
Note: Not supported in the H8S/2678 Series.
ø = 8 MHz to 33 MHz, T
T
a
CC
= –40°C to +85°C (wide-range specifications)
= 3.0 V to 3.6 V, AV
ø
Figure 24.2 System Clock Timing
Symbol Min
t
t
t
t
t
t
t
t
t
t
t
t
t
a
CC
cyc
CH
CL
Cr
Cf
OSC1
OSC2
DEXT
cdif
SDCH
SDCL
sdcr
sdcf
= –20°C to +75°C (regular specifications),
t
CH
= 3.0 V to 3.6 V, V
t
cyc
30.3
10
10
—
—
10
10
500
1/4
10
10
—
—
t
Cf
t
CL
t
cyc
3 1/4
ref
t
Max
500
—
—
5
5
—
—
—
—
—
5
5
Cr
= 3.0 V to AV
Rev. 2.0, 04/02, page 841 of 906
t
cyc
3 ns
Unit
ns
ns
ns
ns
ns
ms
ms
ns
ns
ns
ns
s
CC
, V
Test Conditions
Figure 24.2
Figure 24.2
Figure 24.4 (1)
Figure 24.4 (2)
Figure 24.4 (1)
Figure 24.3
Figure 24.3
Figure 24.3
Figure 24.3
Figure 24.3
SS
= AV
SS
= 0 V,