參數(shù)資料
型號(hào)： P83C654FFP
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： CMOS single-chip 8-bit microcontroller
中文描述： 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PDIP40
文件頁(yè)數(shù)： 10/88頁(yè)
文件大小： 497K
代理商： P83C654FFP
Philips Semiconductors
Product data
P83C654X2/P87C654X2
80C51 8-bit microcontroller family
16 kB OTP/ROM,
256B RAM, low voltage (2.7 to 5.5 V), low power, high speed
(30/33 MHz)
2004 Apr 20
10
CLOCK CONTROL REGISTER (CKCON)
This device allows control of the 6-clock/12-clock mode by means of
both an SFR bit (X2) and an OTP bit. The OTP clock control bit
OX2, when programmed (6-clock mode), supersedes the X2 bit
(CKCON.0). The CKCON register is shown below in Figure 1.
X2
BIT
CKCON.7
CKCON.6
CKCON.5
CKCON.4
CKCON.3
CKCON.2
CKCON.1
CKCON.0
SYMBOL
–
FUNCTION
Reserved.
Reserved.
Reserved.
Reserved.
Reserved.
Reserved.
Reserved.
CPU clock; 1 = 6 clocks for each machine cycle, 0 = 12 clocks for each machine cycle
X2
SU01689
–
–
Not Bit Addressable
CKCON
Address = 8Fh
Reset Value =
x0000000B
7
6
5
4
3
2
1
0
–
–
–
–
–
Figure 1. Clock control (CKCON) register
Also please note that the clock divider applies to the serial port for
modes 0 and 2 (fixed baud rate modes). This is because modes 1
and 3 (variable baud rate modes) use either Timer 1 or Timer 2.
Below is the truth table for the CPU clock mode.
Table 1.
OX2 clock mode bit
(can only be set by
parallel programmer)
X2 bit
(CKCON.0)
CPU clock mode
erased
0
12-clock mode
(default)
erased
1
6-clock mode
programmed
X
6-clock mode
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參數(shù)描述
P83C654FHA 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CMOS single-chip 8-bit microcontroller
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P83C654IBA 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CMOS single-chip 8-bit microcontroller
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