Samsung YP-P10 User Manual download pdf (Page 68)

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101

S3C2440A RISC MICROPROCESSOR PRODUCT OVERVIEW

1-39

Table 1-4. S3C2440A Special Registers (Sheet 14 of 14) (Continued)

Name

Address

(B. Endian)

Address

(L. Endian)

Acc. Unit Read/

Write

Function

AC97 Audio-CODEC Interface

AC_GLBCTRL 0x5B000000 ← W R/W AC97 global control register

AC_GLBSTAT 0x5B000004 R AC97 global status register

AC_CODEC_CMD 0x5B000008 R/W AC97 codec command register

AC_CODEC_STAT 0x5B00000C R AC97 codec status register

AC_PCMADDR 0x5B000010 AC97 PCM out/in channel FIFO

address register

AC_MICADDR 0x5B000014 AC97 mic in channel FIFO address

AC_PCMDATA 0x5B000018 R/W AC97 PCM out/in channel FIFO data

AC_MICDATA 0x5B00001C AC97 MIC in channel FIFO data

Cautions on S3C2440A Special Registers

1. In the little endian mode ‘L’, endian address must be used. In the big endian mode ‘B’ endian address must be

used.

2. The special registers have to be accessed for each recommended access unit.

3. All registers except ADC registers, RTC registers and UART registers must be read/write in word unit (32-bit) in

little/big endian.

4. Make sure that the ADC registers, RTC registers and UART registers be read/write by the specified access unit

and the specified address. Moreover, one must carefully consider which endian mode is used.

5. W : 32-bit register, which must be accessed by LDR/STR or int type pointer (int *).

HW : 16-bit register, which must be accessed by LDRH/STRH or short int type pointer (short int *).

B : 8-bit register, which must be accessed by LDRB/STRB or char type pointer (char int *).

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