em78p257 ELAN Microelectronics Corp, em78p257 Datasheet - Page 45

• Manufacturer Part Number: em78p257
• Description: 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

This specification is subject to change without prior notice.
2. Comparator Outputs
3. Programming the Related Registers
• The compared result are stored in the CMPOUT of R9
• The comparator outputs can output to P51, P52, P63 and P64 by programming Bits 4, 5, 6, and 7
• P52, P51, P63 and P64 must be configured as output if implemented
• Fig. 17 shows the comparator output block diagram.
<IOC90> of the CMP control register to 1
To CMPOUT
CIN1+
CIN1 -
CIN2+
CIN3+
To C0
CIN2 -
(Normal I/O)
CIN3 -
(Normal I/O)
CIN4+
CIN4 -
COIEX
Fig. 17 The Output Configuration of a Comparator
CEX
Q
RESET
EN
D
45
+
+
+
-
+
-
-
-
CMPXIE
C2
C4
C1
C3
Q
EN
COIEX
D
CO1
CO2
CMPXIF
CO3
CO4
To
From OP I/O
EM78P257
07.27.2004 (V1.4)
OTP ROM