gc80c521a CORERIVER Semiconductor, gc80c521a Datasheet - Page 130

• Manufacturer Part Number: gc80c521a
• Description: Flash / Isp / Iap 8-bit Turbo Microcontrollers
• Manufacturer: CORERIVER Semiconductor

RINGC7 RINGC6 RINGC5 RINGC4 RINGC3 RINGC2 RINGC1 RINGC0
R/W(0) R/W(1) R/W(1) R/W(1) R/W(1) R/W(0)
R/W(1) R/W(1) R/W(1) R/W(1) R/W(1) R/W(1) R/W(1) R/W(1)
R/W(0) R/W(0) R/W(0) R/W(0) R/W(0) R/W(1) R/W(0) R/W(1)
P1.7
RINGCON
P1
EXIF
IE5
Appendix B :
IE5~2
XT/RG
RGMD
RGSL
BGS
(90h) : Port 1 Register
(91h) : External Interrupt Flag Register
P1.6
IE4
: External interrupt 5~2 flag.
: System clock selection
: Ring mode. Now system clock is Ring or XTAL.
: 1 = When wake-up from power-down mode in XTAL
: Band-gap select. When set, LVD will run in power-down
0 = Internal Ring Oscillator is selected as system clock.
1 = External clock is selected as system clock.
Generally RGMD is the invert of XT/RG except when the
ring Oscillator provides clock during wake-up from power-
down .
clock, use Ring Oscillator as system clock during 65,536
XTAL clocks.
mode.
(8Fh) : Internal Ring Calibration Control Register
P1.5
IE3
P1.4
IE2
XT/RG
P1.3
SFR Description [8Fh ~ 93h]
RGMD
P1.2
R/W(1)
RGSL
P1.1
R/W(1)
P1.0
BGS
R/W(0) R/W(0) R/W(0) R/W(0) R/W(0) R/W(0) R/W(0) R/W(0)
R/W(0) R/W(0) R/W(0) R/W(0) R/W(0) R/W(0) R/W(0) R/W(0)
CNT7
PWM0CON
PWM0CNT(93h) : PWMA CH0 Counter Register
-
CPS2, CPS1, CPS0 : PWMA counter frequency selection.
PWMOVF : PWMA counter overflow flag.
PWMEN : PWMA counter run control bit.
Software can write this register for the initialization of the counter.
CNT6
CPS2
[0,0,0] = FOSC / 1 ; Default
[0,0,1] = FOSC / 2
[0,1,0] = FOSC / 4
[0,1,1] = FOSC / 8
[1,0,0] = FOSC / 16
[1,0,1] = FOSC / 32
[1,1,0] = FOSC / 64
[1,1,1] = FOSC / 128
Set by hardware and cleared by software.
PWMOVF flags an interrupt.
[0] = Stop the PWMA counter.
[1] = Run the PWMA counter.
(92h) : PWMA CH0 Control Register
CPS1
CNT5
(4/19)
CNT4
CPS0
MiDAS1.0B Family
CNT3
-
CNT2
-
PWMOVF PWMEN
CNT1
CNT0
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