HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 107

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

5.3.3
Bits STS2 to STS0 in SYSCR1 should be set as follows.
Table 5.4
STS2
0
0
0
0
1
Note: * Don’t care
98
When a crystal oscillator is used
The table 5.4 gives settings for various operating frequencies. Set bits STS2 to STS0 for a
waiting time of at least 10 ms.
When an external clock is used
Any values may be set. Normally the minimum time (STS2 = STS1 = STS0 = 0) should be set.
Oscillator Settling Time after Standby Mode is Cleared
STS1
0
0
1
1
*
Clock Frequency and Settling Time (times are in ms)
STS0
0
1
0
1
*
Waiting Time
8,192 states
16,384 states
32,768 states
65,536 states
131,072 states
5 MHz
1.6
3.2
6.6
13.1
26.2
4 MHz
2.0
4.1
8.2
16.4
32.8
2 MHz
4.1
8.2
16.4
32.8
65.5
1 MHz
8.2
16.4
32.8
65.5
131.1
0.5 MHz
16.4
32.8
65.5
131.1
262.1