Energy Meter IC Family Software Instruction Manual

71M652X Software User’s Guide

Revision 1.7 TERIDIAN Proprietary 117 of 138

Instructions that Affect Flags

Instruction

Affected Flag

Instruction

Affected Flag

C OV AC C OV AC

ADD X X X CLR C 0

ADDC X X X CPL C X

SUBB X X X ANL C, bit X

MUL 0 X ANL C, /bit X

DIV 0 X ORL C, bit X

DA X ORL C, /bit X

RRC X MOV C, bit X

RLC X CJNE X

SETB C 1

Table 6-17: Instructions Affecting Flags

Note: Operations affecting the PSW or bits in the PSW will also affect flag settings

6.3 80515 HARDWARE DESCRIPTION

The 80515 core implemented in the 71M652X chips consists of:

1. Control processor unit (CPU), also referred to as MPU throughout this document

2. Arithmetic-logic unit

3. Clock control unit

4. Memory control unit

5. RAM and SFR control unit

6. Ports registers unit

7. Timer 0, 1 unit

8. Serial 0, 1 interfaces

9. Watchdog timer

10. Interrupt service routine unit