gc80c510 CORERIVER Semiconductor, gc80c510 Datasheet - Page 100

• Manufacturer Part Number: gc80c510
• Description: Eprom/rom 8-bit Turbo Microcontrollers
• Manufacturer: CORERIVER Semiconductor

6.2.10.2 OSCICN (BEh) : Internal Ring Oscillator Control Register
6.2.10.3 STATUS (C5h) : Crystal Status Register
Symbol
RINGON
Symbol
Bit No.
Bit No.
XTUP
DIV1
DIV0
-
-
Reserved.
Internal Ring Oscillator Enable.
0 = Internal Ring Oscillator is killed.
1 = Internal Ring oscillator is running.
Mode
Reserved.
Crystal Oscillator Warm-up Status.
Note : Don’t clear this bit when F
warm-up, and represents the system clock of the crystal oscillator is stable(1) or not(0).
bit is set to 1 following a crystal stabilization by H/W.
0
1
2
3
7
Ring Oscillator Divider
7
This bit indicates whether the CPU crystal oscillator has completed the 65,536 cycle
This bit is cleared by H/W when Power-on Reset, during Power-down wake-up. This
-
-
crystal oscillator, internal ring oscillator can be run (RINGON=1).
DIV1
0
0
1
1
6
6
-
-
DIV0
0
1
0
1
5
5
-
-
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OSC
XTUP
R(0)
(Default)
4
4
-
Description
is Ring oscillator (XT/RG = 0). But, although F
Description
Description (Ring Oscillator @ 5V)
3
3
-
-
4 MHz / 1
4 MHz / 2
4 MHz / 4
4 MHz / 8
RINGON
R/W(1)
2
2
-
Functional Description
R/W(0)
DIV1
1
1
-
R/W(0)
DIV0
0
0
-
OSC
is