p87lpc762fd NXP Semiconductors, p87lpc762fd Datasheet - Page 37

• Manufacturer Part Number: p87lpc762fd
• Description: Low Power, Low Price, Low Pin Count 20 Pin Microcontroller With 2 Kbyte Otp
• Manufacturer: NXP Semiconductors

1. Tables 9 and 10 apply to UART modes 1 and 3 (variable rate modes), and show CPU clock rates in MHz for standard baud rates from 2400
2. Table 9 shows timer settings and CPU clock rates with the SMOD1 bit in the PCON register = 0 (the default after reset), while Table 10
3. The tables show all potential CPU clock frequencies up to 20 MHz that may be used for baud rates from 9600 baud to 115.2 k baud. Other
4. Table entries marked with an asterisk (*) indicate standard crystal and ceramic resonator frequencies that may be obtained from many
Philips Semiconductors
Table 10. Baud Rates, Timer Values, and CPU Clock Frequencies for SMOD1 = 1
NOTES TO TABLES 9 AND 10:
2001 Oct 26
Timer Co nt
Timer Count
Low power, low price, low pin count (20 pin)
microcontroller with 2 kbyte OTP
to 115.2k baud.
reflects the SMOD1 bit = 1.
CPU clock frequencies that would give only lower baud rates are not shown.
sources without special ordering.
–10
–11
–12
–13
–14
–15
–16
–17
–18
–19
–20
–21
–1
–2
–3
–4
–5
–6
–7
–8
–9
* 1.8432
* 3.6864
0.2304
0.4608
0.6912
0.9216
1.1520
1.3824
1.6128
2.0736
2.3040
2.5344
2.7648
2.9952
3.2256
3.4560
3.9168
4.1472
4.3776
4.6080
4.8384
2400
* 1.8432
* 3.6864
* 7.3728
0.4608
0.9216
1.3824
2.3040
2.7648
3.2256
4.1472
4.6080
5.0688
5.5296
5.9904
6.4512
6.9120
7.8336
8.2944
8.7552
9.2160
9.6768
4800
* 14.7456
* 18.4320
* 11.0592
* 1.8432
* 3.6864
* 7.3728
10.1376
12.9024
13.8240
15.6672
16.5888
17.5104
19.3536
11.9808
0.9216
2.7648
4.6080
5.5296
6.4512
8.2944
9.2160
9600
34
Baud Rate
* 11.0592
* 14.7456
* 18.4320
* 1.8432
* 3.6864
* 7.3728
12.9024
16.5888
5.5296
9.2160
19.2 k
–
–
–
–
–
–
–
–
–
–
–
* 14.7456
* 18.4320
* 11.0592
* 3.6864
* 7.3728
38.4 k
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
* 11.0592
16.5888
5.5296
57.6 k
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
87LPC762
Preliminary data
* 11.0592
115.2 k
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–