P87LPC768 NXP Semiconductors, P87LPC768 Datasheet - Page 44

• Manufacturer Part Number: P87LPC768
• Description: The P87LPC768 is a 20-pin single-chip microcontroller designed forlow pin count applications demanding high-integration, low costsolutions over a wide range of performance requirements
• Manufacturer: NXP Semiconductors

1. Tables 6 and 7 apply to UART modes 1 and 3 (variable rate modes), and show CPU clock rates in MHz for standard baud rates from 2400 to
2. Table 6 shows timer settings and CPU clock rates with the SMOD1 bit in the PCON register = 0 (the default after reset), while Table 7
3. The tables show all potential CPU clock frequencies up to 20 MHz that may be used for baud rates from 9600 baud to 115.2k 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 11. Baud Rates, Timer Values, and CPU Clock Frequencies for SMOD1 = 1
NOTES TO TABLES 10 AND 11:
2002 Mar 12
Timer Co nt
Timer Count
Low power, low price, low pin count (20 pin) microcontroller
with 4 kB OTP 8-bit A/D, Pulse Width Modulator
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
42
Baud Rate
* 11.0592
* 14.7456
* 18.4320
* 1.8432
* 3.6864
* 7.3728
12.9024
16.5888
5.5296
9.2160
19.2k
–
–
–
–
–
–
–
–
–
–
–
* 14.7456
* 18.4320
* 11.0592
* 3.6864
* 7.3728
38.4k
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
* 11.0592
16.5888
5.5296
57.6k
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
P87LPC768
Preliminary data
* 11.0592
115.2k
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–