87C575 Philips Semiconductors, 87C575 Datasheet - Page 13

• Manufacturer Part Number: 87C575
• Description: 80C51 8-bit microcontroller family 8K/256 OTP/ROM/ROMless/ 4 comparator/ failure detect circuitry/ watchdog timer
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1998 May 01
80C51 8-bit microcontroller family
8K/256 OTP/ROM/ROMless, 4 comparator, failure detect circuitry, watchdog timer
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.
CCAPMn Address
Symbol
–
ECOMn
CAPPn
CAPNn
MATn
TOGn
PWMn
ECCFn
X
X
X
X
X
X
X
X
–
ECOMn
X
X
X
0
1
1
1
1
Not Bit Addressable
Bit:
Function
Not implemented, reserved for future use*.
Enable Comparator. ECOMn = 1 enables the comparator function.
Capture Positive, CAPPn = 1 enables positive edge capture.
Capture Negative, CAPNn = 1 enables negative edge capture.
Match. When MATn = 1, a match of the PCA counter with this module’s compare/capture register causes the CCFn bit
in CCON to be set, flagging an interrupt.
Toggle. When TOGn = 1, a match of the PCA counter with this module’s compare/capture register causes the CEXn
pin to toggle.
Pulse Width Modulation Mode. PWMn = 1 enables the CEXn pin to be used as a pulse width modulated output.
Enable CCF interrupt. Enables compare/capture flag CCFn in the CCON register to generate an interrupt.
CAPPn
0
1
0
1
0
0
0
0
–
7
CCAPM0
CCAPM1
CCAPM2
CCAPM3
CCAPM4
CAPNn
ECOMn
0
0
1
1
0
0
0
0
Figure 7. CCAPMn: PCA Modules Compare/Capture Registers
6
0DAH
0DBH
0DCH
0DDH
0DEH
Figure 8. PCA Module Modes (CCAPMn Register)
MATn
CAPPn
0
0
0
0
1
1
0
1
5
TOGn
CAPNn
X
0
0
0
0
0
1
0
4
PWMn
13
MATn
0
0
0
0
0
0
1
0
3
ECCFn
TOGn
X
X
X
X
X
X
0
0
2
No operation
16-bit capture by a positive-edge trigger on CEXn
16-bit capture by a negative trigger on CEXn
16-bit capture by a transition on CEXn
16-bit Software Timer
16-bit High Speed Output
8-bit PWM
Watchdog Timer
PWMn
1
ECCFn
MODULE FUNCTION
0
80C575/83C575/
Reset Value = X000 0000B
Product specification
87C575
SU00037