EM78P342NP datasheet(73/102 Pages) EMC

73 / 102 page

EM78P341N/342N/343N

8-Bit Microprocessor with OTP ROM

Product Specification (V1.0) 12.01.2006

• 67

(This specification is subject to change without further notice)

6.10.1 External Reference Signal

The analog signal that is presented at Cin – is compared to the signal at Cin+. The

digital output (CO) of the comparator is adjusted accordingly by taking into

consideration the following notes:

NOTE

■ The reference signal must be between Vss and Vdd.

■ The reference voltage can be applied to either pin of the comparator.

■ Threshold detector applications may be of the same reference.

■ The comparator can operate from the same or different reference sources.

6.10.2 Comparator Outputs

The compared result is stored in the CMPOUT of IOC80.

The comparator outputs are sent to CO (P64) by programming Bit 4 & Bit 3

<COS1, COS0> of the IOC80 register to <1,0>. See table under Section 6.2.4,

IOC80 (Comparator and TCCA Control Registers) for Comparator/OP select bits

function description.

The following figure shows the Comparator Output block diagram.

To C0

To CPIF

To CMPOUT

CMRD

From other

comparator

RESET

From OP I/O

Fig. 6-16 Comparator Output Configuration

EM78P342NP Datasheet(PDF) 73 Page - ELAN Microelectronics Corp