AK4543 Datasheet, PDF (10/31 Pages) Asahi Kasei Microsystems – AC’97 Rev 2.1 Multimedia Audio CODEC

[ASAHI KASEI]
nActivate Test Mode
RESET#
SDATA_OUT
SDATA_IN
BIT_CLK
nAKM Test Mode
RESET#
SDATA_OUT=”L”
SYNC
Tsetup2rst
Toff
VIH
VIH
HI-Z
Tsetup2rst
VIH
VIH
[AK4543]
Notes:¹
1. All AC-link signals are normally low through the trailing edge of RESET#. Bringing SDATA_OUT high for the rising edge of RESET#
causes the AK4543 AC-link outputs to go high impedance which is suitable for ATE in circuit testing. Note that the AK4543 enters in
the ATE test mode regardless SYNC is high or low.
2. Bringing both SYNC high and SDATA_OUT low for the rising edge of RESET# causes AKM test mode.
3. Once test modes have been entered, the only way to return to the normal operating state is to issue “cold reset” which issues RESET#
with both SYNC and SDATA_OUT low.
1 _{All the following sentences written with small italic font in this document quote the AC’97 component specification.}
<M0046-E-01>
- 10 -
1999/01