Cirrus Logic CS5345 - Manual (Page 32)

32 DS658F4
CS5345
6. REGISTER DESCRIPTION
6.1 Chip ID - Register 01h
Function:
This register is Read-Only. Bits 7 through 4 are the part number ID, which is 1110b (0Eh), and the remaining
bits (3 through 0) indicate the device revision as shown in
Table 5 below.
6.2 Power Control - Address 02h
6.2.1 Freeze (Bit 7)
Function:
This function allows modifications to be made to certain control port bits without the changes taking effect
until the Freeze bit is disabled. To make multiple changes to these bits take effect simultaneously, set the
Freeze bit, make all changes, then clear the Freeze bit. The bits affected by the Freeze function are listed
in
Table 6 .
6.2.2 Power-Down MIC (Bit 3)
Function:
The microphone preamplifier block will enter a low-power state whenever this bit is set.
6.2.3 Power-Down ADC (Bit 2)
Function:
The ADC pair will remain in a reset state whenever this bit is set.
6.2.4 Power-Down Device (Bit 0)
Function:
The device will enter a low-power state whenever this bit is set. The power-down bit is set by default and
must be cleared before normal operation can occur. The contents of the control registers are retained
when the device is in power-down.
7 6 5 4 3 2 1 0
PART3 PART2 PART1 PART0 REV3 REV2 REV1 REV0
REV[2:0] Revision
001 A
010 B, C0
011 C1
Table 5. Device Revision
7 6 5 4 3 2 1 0
Freeze Reserved Reserved Reserved PDN_MIC PDN_ADC Reserved PDN
Name Register Bit(s)
Mute 04h 2
Gain[5:0] 07h 5:0
Gain[5:0] 08h 5:0
Table 6. Freeze-able Bits