Comparator (COMP) RM0351
584/1693 DocID024597 Rev 3
19.6 COMP registers
19.6.1 Comparator 1 control and status register (COMP1_CSR)
The COMP1_CSR is the Comparator 1 control/status register. It contains all the bits /flags
related to comparator1.
Address offset: 0x00
System reset value: 0x0000 0000
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
LOCK VALUE Res. Res. Res. Res. Res. Res.
SCAL
EN
BRG
EN
Res. BLANKING HYST
rs r rw rw rw rw
1514131211109876543210
POLA
RITY
Res. Res. Res. Res. Res. Res. Res.
INP
SEL.
INMSEL PWRMODE Res. EN
rw rw rw rw rw
Bit 31 LOCK: COMP1_CSR register lock bit
This bit is set by software and cleared by a hardware system reset. It locks the whole
content of the comparator 1 control register, COMP1_CSR[31:0].
0: COMP1_CSR[31:0] for comparator 1 are read/write
1: COMP1_CSR[31:0] for comparator 1 are read-only
Bit 30 VALUE: Comparator 1 output status bit
This bit is read-only. It reflects the current comparator 1 output taking into account
POLARITY bit effect.
Bits 29:24 Reserved, must be kept at reset value.
Bit 23 SCALEN: Voltage scaler enable bit
This bit is set and cleared by software. This bit enable the outputs of the V
REFINT
divider
available on the minus input of the Comparator 1.
0: Bandgap scaler disable (if SCALEN bit of COMP2_CSR register is also reset)
1: Bandgap scaler enable
Bit 22 BRGEN: Scaler bridge enable
This bit is set and cleared by software (only if LOCK not set). This bit enable the bridge of
the scaler.
0: Scaler resistor bridge disable (if BRGEN bit of COMP2_CSR register is also reset)
1: Scaler resistor bridge enable
If SCALEN is set and BRGEN is reset, BG voltage reference is available but not 1/4BGAP,
1/2BGAP, 3/4 BGAP. BGAP value is sent instead of 1/4BGAP, 1/2BGAP, 3/4 BGAP.
If SCALEN and BRGEN are set, 1/4 BGAP 1/2BGAP 3/4BGAP and BGAP voltage
references are available.
Bit 21 Reserved, must be kept at reset value
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