AK5730 Datasheet, PDF (32/50 Pages) Asahi Kasei Microsystems – 4-Channel Differential Audio ADC for Line & Mic Inputs

[AK5730]
■ Error Detection
The following seven events cause the INT pin to show the status of the interrupt condition. When the PDN pin is “L”, the
INT pin goes to “Hi-z”.
1. OPEN: Open circuit
2. SHTD: Short between the positive and negative mic input
3. SHTG: Short to ground
4. SHTV: Short to VBAT
5. OVCR1: Mic Bias Over-current(90mA(typ)) of booster
6. OVCR2: Charge Pump Over-current(600mA(typ)) of booster
7. OVTP: Over-temp(165 degrees(typ)) of booster
The INT pin outputs an ORed signal based on the above seven interrupt events. When error information is masked, the
interrupt event does not affect the operation of the INT pin. This pin should be connected to DVDD (typ. 3.3V) or lower
voltage via a 10kohm resistor.
Once the INT pin goes to “L”, it remains “L” until writing INTR bit = “1”. After writing “1” to INTR bit, it automatically
returns to “0”.
OPEN, SHTD, SHTG, SHTV, OVCR and OVTP bits in Address 07-0BH indicate the interrupt status events above in real
time. Once they go to “1”, it stays “1” until writing INTR bit = “1”.
When MSHTV*, MSHTG*, MSHTD*, MOPEN* (*: 1-4) bits (Address=0C-0FH) go to "1", error information at
SHTV*, SHTG*, SHTD*, OPEN* bits can not be masked but does not affect the operation of the INT pin. (Table 16)
When over-temperature (OVTP) or over-current (OVCR1, OVCR2) is detected, the AK5730 disable the block listed on
Table 15. Unless the error is due to over-temperature or over-current, error detection is restarted by writing INTR bit =
“1”. When the error is due to over-temperature or over-current, restart the AK5730 by the PDN pin or RSTN bit.
INT detection CPUIF REFBLK PLL
VCMIREF CP
MIC
ADC
SAR ERR
A
A
A
A
A
A
A
TSD
Overtemp.
A
A
A
A
L
A
×
MIC
A
A
A
A
L
A
×
overcurrent +
MIC
A
A
A
A
overcurrent -
×
×
×
CP
A
A
A
A
L
A
×
overcurrent
A: Active Block, L: Active in Low Power Mode, ×: Power Down
Table 15. Block Conditions on Error Detection
SARIBUF SAR
A
A
A
A
A
A
×
×
×
×
MICDIAGS
A
A
A
×
×
Unmasked Event
Not detected
DETECTED
Masked Event
INT pin
Not detected
Hi-Z
DETECTED
L
(goes “Hi-Z” after writing INTR bit =
“1”)
Table 16. Error Handling in Serial Control Mode
Rev 0.8
- 32 -
2013/06