Ac'97 Register Summary; Register Mapping Summary - Intel PXA255 Developer's Manual

13.9

AC'97 Register Summary

All AC'97 registers are word-addressable (32 bits wide) and increment in units of 0x00004. The
registers in the CODEC are half-word addressable (16 bits wide), and increment in units of
0x00002. These register sets are mapped in the address range of 0x4050_000 through
0x405F_FFFF.
Table 13-24. Register Mapping Summary
Address
0x4050_0000
0x4050_0004
0x4050_0008
0x4050_000C
0x4050_0010
0x4050_0014
0x4050_0018
0x4050_001C
0x4050_0020
0x4050_0024 - 0x4050_003C
0x4050_0040
0x4050_0044 - 0x4050_005C
0x4050_0060
0x4050_0064 - 0x4050_00FC
0x4050_0100
0x4050_0104
0x4050_0108
0x4050_010C
0x4050_0110
0x4050_0114
0x4050_0118
0x4050_011C - 0x4050_013C
0x4050_0140
0x4050_0144 - 0x4050_01FC
(0x4050_0200 - 0x4050_02FC)
with all in increments of 0x00004
(0x4050_0300 - 0x4050_03FC)
with all in increments of 0x00004
(0x4050_0400 - 0x4050_04FC)
with all in increments of 0x0000_0004
(0x4050_0500 - 0x4050_05FC)
with all in increments of 0x00004
Intel® PXA255 Processor Developer's Manual
Name Description
POCR PCM Out Control Register
PICR PCM In Control Register
MCCR Mic In Control Register
GCR Global Control Register
POSR PCM Out Status Register
PISR PCM In Status Register
MCSR Mic-In Status Register
GSR Global Status Register
CAR CODEC Access Register
— reserved
PCDR PCM FIFO Data Register
— reserved
MCDR Mic-in FIFO Data Register
— reserved
MOCR Modem-Out Control Register
— reserved
MICR Modem-In Control Register
— reserved
MOSR Modem-Out Status Register
— reserved
MISR Modem-In Status Register
— reserved
MODR Modem FIFO Data Register
— reserved
— Primary Audio CODEC registers
— Secondary Audio CODEC registers
— Primary Modem CODEC registers
— Secondary Modem CODEC registers
AC'97 Controller Unit
13-35