Cirrus Logic CS4265 - Manual (Page 36)

36 DS657F3
CS4265
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 1101b (0Dh), 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.
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 PDN_DAC PDN
Name Register Bit(s)
MuteDAC 03h 2
MuteADC 04h 2
Gain[5:0] 07h 5:0
Gain[5:0] 08h 5:0
Vol[7:0] 0Ah 7:0
Vol[7:0] 0Bh 7:0
TxMute 0Eh 4
Table 6. Freeze-able Bits