AK2365A Datasheet, PDF (11/33 Pages) Asahi Kasei Microsystems – FM IF Detector with Narrow Band Filter

11. Power-up Sequence
[AK2365A]
PDN (LDO)
On-chip LDO
(1.8V operation)
RSTN
Write to the register
700s 1s
The register can be written
1.8V
Internal register values are set.
Note) After PDN is set to “High”, registers remain undefined. In order to initialize them, RSTN is
set to “High”
12. System Reset
Parameter
Symbol Condition Min.
Hardware reset signal
input width
t_RSTN RSTN pin
1
Software reset
SRST
register
Typ.
Max.
Unit Remarks
µs
*1)
*2)
*1) After power-on, be sure to perform a hardware reset operation (register initialization). The
system is reset by a low pulse input of 1s (min.) and enters the normal operation state. At this
moment, the digital (DI) pins are set as follows: RSTN pin to High, SCLK pin to Low, SDATA pin
to Low, CSN pin to Low.
tRSTN
RSTN
V_IH
V_IL
*2) When data 0x04:10101010 is written to the SRST[7:0] register, software reset is performed.
This setting initializes the registers and the operation mode is set to mode 2 (Standby 2).
After software reset is completed, this register comes to “0”.
MS1591-E-03
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2015/4