Auto-Calibration Control Register (Calcr) - Fujitsu F2MC-8FX Hardware Manual

CHAPTER 27 REAL TIME CLOCK
27.3.15

Auto-Calibration Control Register (CALCR)

The auto-calibration control register is used to control the operation of auto-calibration
circuit and indicate the status of the latest auto-calibration operation.
Auto-calibration Contol Register (CALCR)
CALCR (Auto-Calibration Control Register)
Address BIT 7 BIT 6
0FFE -
H
R0/WX R0/WX R0/WX
* R/W : Readable and writable, - : Unused, X : Indeterminate
R0/WX : Read 0 and write has no effect on operation
510
Figure 27.3-20 Auto-Calibration Control Register (CALCR)
BIT 5 BIT 4 BIT 3
- - CALEN CALIRQ CALCP CALOF CALUF
R/W R/W
BIT 2 BIT 1 BIT 0 Initial value
00000000
R/W R/W R/W
CALUF
Calibration Result underflow bit
0
no underflow
1 Auto-calibration offset result less than -128
CALOF
Calibration Result overflow bit
0
no overflow
1 Auto-calibration offset result is greater than 127
CALCP
Auto-calibration status bit
0
Auto-calibration has not start or not completed
1
Auto-calibration has completed
CALIRQ Calibration completion
0
Auto-calibration completeion interrupt is masked
1 Auto-calibration completeion interrupt is not masked
Auto-calibration enable bit
CALEN
Auto-calibration not started
0
or not completed
1 Auto-calibration started
B
interrupt enable
Read Write
Disable Auto -Calibration
Start Auto-Calibration
bit