參數(shù)資料
型號(hào)： P87C58UFPN
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 80C51 8-bit microcontroller family 8K.64K/256.1K OTP/ROM/ROMless, low voltage 2.7V.5.5V, low power, high speed 33 MHz
中文描述： 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PDIP40
封裝： 0.600 INCH, PLASTIC, MO-015, SOT-129-1, DIP-40
文件頁(yè)數(shù)： 27/56頁(yè)
文件大小： 337K
代理商： P87C58UFPN
Philips Semiconductors
Product specification
8XC52/54/58/80C32
8XC51FA/FB/FC/80C51FA
8XC51RA+/RB+/RC+/RD+/80C51RA+
80C51 8-bit microcontroller family
8K–64K/256–1K OTP/ROM/ROMless, low voltage (2.7V–5.5V),
low power, high speed (33MHz)
1999 Apr 01
27
(8XC51FX and 8XC51RX+ ONLY)
CMOD
Address = OD9H
Reset Value = 00XX X000B
CIDL
WDTE
–
–
–
CPS1
CPS0
ECF
Bit:
Symbol
Function
CIDL
Counter Idle control: CIDL = 0 programs the PCA Counter to continue functioning during idle Mode. CIDL = 1 programs
it to be gated off during idle.
Watchdog Timer Enable: WDTE = 0 disables Watchdog Timer function on PCA Module 4. WDTE = 1 enables it.
Not implemented, reserved for future use.*
PCA Count Pulse Select bit 1.
PCA Count Pulse Select bit 0.
CPS1
CPS0
Selected PCA Input**
0
0
0
Internal clock, f
OSC
÷
12
0
1
1
Internal clock, f
OSC
÷
4
1
0
2
Timer 0 overflow
1
1
3
External clock at ECI/P1.2 pin (max. rate = f
OSC
÷
8)
PCA Enable Counter Overflow interrupt: ECF = 1 enables CF bit in CCON to generate an interrupt. ECF = 0 disables
that function of CF.
WDTE
–
CPS1
CPS0
ECF
NOTE:
*
User software should not write 1s to reserved bits. These bits may be used in future 8051 family products to invoke new features. In that case, the reset or inactive value of the
new bit will be 0, and its active value will be 1. The value read from a reserved bit is indeterminate.
** f
OSC
= oscillator frequency
SU00035
7
6
5
4
3
2
1
0
Figure 17. CMOD: PCA Counter Mode Register
CCON
Address = OD8H
Reset Value = 00X0 0000B
CF
CR
–
CCF4
CCF3
CCF2
CCF1
CCF0
Bit Addressable
Bit:
Symbol
Function
CF
PCA Counter Overflow flag. Set by hardware when the counter rolls over. CF flags an interrupt if bit ECF in CMOD is
set. CF may be set by either hardware or software but can only be cleared by software.
PCA Counter Run control bit. Set by software to turn the PCA counter on. Must be cleared by software to turn the PCA
counter off.
Not implemented, reserved for future use*.
PCA Module 4 interrupt flag. Set by hardware when a match or capture occurs. Must be cleared by software.
PCA Module 3 interrupt flag. Set by hardware when a match or capture occurs. Must be cleared by software.
PCA Module 2 interrupt flag. Set by hardware when a match or capture occurs. Must be cleared by software.
PCA Module 1 interrupt flag. Set by hardware when a match or capture occurs. Must be cleared by software.
PCA Module 0 interrupt flag. Set by hardware when a match or capture occurs. Must be cleared by software.
CR
–
CCF4
CCF3
CCF2
CCF1
CCF0
NOTE:
*
User software should not write 1s to reserved bits. These bits may be used in future 8051 family products to invoke new features. In that case, the reset or inactive value of the
new bit will be 0, and its active value will be 1. The value read from a reserved bit is indeterminate.
SU00036
7
6
5
4
3
2
1
0
Figure 18. CCON: PCA Counter Control Register
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