gc80c520a CORERIVER Semiconductor, gc80c520a Datasheet - Page 19

• Manufacturer Part Number: gc80c520a
• Description: Midas1.0 Family Mask Rom/eprom/romless 8-bit Turbo Microcontrollers
• Manufacturer: CORERIVER Semiconductor

CAUTION: Don’t modify * bits. Modifying these bits can cause the malfunctions. Especially the following
bits of SFRs should not be updated.
6.1.3 Instruction Set Summary
The MiDAS1.0 family executes all the instructions of the standard 80C52. The instructions of the
MiDAS1.0 family produce the same result with those of the standard 80C52.
The MiDAS1.0 family has a special internal architecture and different timing to those of the standard
80C52. This means the relative duration of the individual instructions, i.e. the number of clock cycles per
instructions, is different to that of 80C52.
Refer to Appendix A for more details about instruction set.
PWM 1 Duty Data
Accumulator
ADC channel selection and ADC input clock
divide control
Alternate
Port 0 Pull-up Control
Port 1 Pull-up Control
Port 2 Pull-up Control
Port 3 Pull-up Control
Extended Interrupt Enable
ADC Result value including MSB bit
ADC Control & LSB bit of ADC Result value
B Register
Extended Interrupt Priority
MiDAS1.0 Family
function Selection
EXIF.3(XT) : This bit must always remain high which is the default value.
PMR.3(*) : This bit should not be modified.
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PWM1D
ADCSEL
ALTSEL
ADCON
P0SEL
P1SEL
P2SEL
P3SEL
ADCR
ACC
EIE
EIP
B
DFh
E0h
E2h
E3h
E4h
E5h
E6h
E7h
E8h
EEh
EFh
F0h
F8h
00000000
00000000
000*0000
**000000
11111111
00000000
00000000
00000000
*0000000
00000000
001000*0
00000000
*0000000
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No