STA321 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STA321

4-channel digital audio system with FFX™ driver

STMicroelectronics 

Digital processing stage

STA321

6.14.3

Reading a set of five coefficients/locations from RAM

z Write RAM address of b0 to registers START_ADDR2 and START_ADDR1

z Write 1 to bit RA in register PROCCTRL

z (b0) Read 8 MSBs of coefficient in register I2CB0_TOP

z Read 8 middle bits of coefficient in register I2CB0_MID

z Read 8 LSBs of coefficient in register I2CB0_BOT

z (b1) Read 8 MSBs of coefficient in register I2CB1_TOP

z Read 8 middle bits of coefficient in register I2CB1_MID

z Read 8 LSBs of coefficient in register I2CB1_BOT

z (b2) Read 8 MSBs of coefficient in register I2CB2_TOP

z Read 8 middle bits of coefficient in register I2CB2_MID

z Read 8 LSBs of coefficient in register I2CB2_BOT

z (a1) Read 8 MSBs of coefficient in register I2CA1_TOP

z Read 8 middle bits of coefficient in register I2CA1_MID

z Read 8 LSBs of coefficient in register I2CA1_BOT

z (a2) Read 8 MSBs of coefficient in register I2CA2_TOP

z Read 8 middle bits of coefficient in register I2CA2_MID

z Read 8 LSBs of coefficient in register I2CA2_BOT

Figure 28. Reading five contiguous RAM locations

Write address to

START_ADDR[8:0]

0x61 = address[8]

0x62 = address[7:0]

Write 1 to bit RA

in PROC_CTRL

0x60 = 0x08

Read top 8 bits

of coefficient

Read middle 8 bits

of coefficient

Read bottom 8 bits

of coefficient

top_val =

0x51/0x54/0x57/0x5A/0x5D

mid_val =

0x52/0x55/0x58/0x5B/0x5E

bot_val =

0x53/0x56/0x59/0x5C/0x5F

Repeat for All 5 Coefficients

46/157

Doc ID 15351 Rev 3

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