P89C660 View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
P89C660 Datasheet PDF : 89 Pages
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Philips Semiconductors
80C51 8-bit Flash microcontroller family
16KB/32KB/64KB ISP/IAP Flash with 512B/1KB/2KB/8KB RAM
Product data
P89C660/P89C662/P89C664/
P89C668
Table 3. Serial Clock Rates
6-clock mode
CR2
0
0
0
0
1
1
1
1
CR1
0
0
1
1
0
0
1
1
CR0
0
1
0
1
0
1
0
1
3 MHz
23
27
31
37
6.25
50
100
0.24 < 62.5
0 < 255
BIT FREQUENCY (kHz) AT fOSC
6 MHz
8 MHz
12 MHz2
47
54
63
75
12.5
100
200
0.49 < 62.5
0 < 254
62.5
71
83.3
100
17
1331
2671
0.65 < 55.6
0 < 253
94
1071
1251
1501
25
2001
4001
0.98 < 50.0
0 < 251
15 MHz2
1171
1341
1561
1881
31
2501
5001
1.22 < 52.1
0 < 250
fOSC DIVIDED BY
128
112
96
80
480
60
30
48 × (256 – (reload value Timer 1))
Reload value Timer 1 in Mode 2.
12-clock mode
BIT FREQUENCY (kHz) AT fOSC
CR2 CR1 CR0
6 MHz
12 MHz
16 MHz
24 MHz3
30 MHz3
fOSC DIVIDED BY
0
0
0
23
47
62.5
94
1171
256
0
0
1
27
54
71
1071
1341
224
0
1
0
31
63
83.3
1251
1561
192
0
1
1
37
75
100
1501
1881
160
1
0
0
6.25
12.5
17
25
31
960
1
0
1
50
100
1331
2001
2501
120
1
1
0
100
200
2671
4001
5001
60
1
1
1
0.24 < 62.5 0.49 < 62.5 0.65 < 55.6 0.98 < 50.0 1.22 < 52.1 96 × (256 – (reload value Timer 1))
0 < 255
0 < 254
0 < 253
0 < 251
0 < 250
Reload value Timer 1 in Mode 2.
NOTES:
1. These frequencies exceed the upper limit of 100 kHz of the I2C-bus specification and cannot be used in an I2C-bus application.
2. At fOSC = 12 MHz/15 MHz the maximum I2C bus rate of 100 kHz cannot be realized due to the fixed divider rates.
3. At fOSC = 24 MHz/30 MHz the maximum I2C bus rate of 100 kHz cannot be realized due to the fixed divider rates.
2002 Oct 28
19
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