STA321 datasheet(46/157 Pages) STMICROELECTRONICS

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Digital processing stage

STA321

46/157

Doc ID 15351 Rev 3

6.14.3

Reading a set of five coefficients/locations from RAM

Write RAM address of b0 to registers START_ADDR2 and START_ADDR1

Write 1 to bit RA in register PROCCTRL

(b0) Read 8 MSBs of coefficient in register I2CB0_TOP

Read 8 middle bits of coefficient in register I2CB0_MID

Read 8 LSBs of coefficient in register I2CB0_BOT

(b1) Read 8 MSBs of coefficient in register I2CB1_TOP

Read 8 middle bits of coefficient in register I2CB1_MID

Read 8 LSBs of coefficient in register I2CB1_BOT

(b2) Read 8 MSBs of coefficient in register I2CB2_TOP

Read 8 middle bits of coefficient in register I2CB2_MID

Read 8 LSBs of coefficient in register I2CB2_BOT

(a1) Read 8 MSBs of coefficient in register I2CA1_TOP

Read 8 middle bits of coefficient in register I2CA1_MID

Read 8 LSBs of coefficient in register I2CA1_BOT

(a2) Read 8 MSBs of coefficient in register I2CA2_TOP

Read 8 middle bits of coefficient in register I2CA2_MID

Read 8 LSBs of coefficient in register I2CA2_BOT

Figure 28.

Reading five contiguous RAM locations

START_ADDR[8:0]

Write address to

of coefficient

Read bottom 8 bits

of coefficient

Read top 8 bits

of coefficient

Read middle 8 bits

in PROC_CTRL

0x61 = address[8]

0x62 = address[7:0]

Write 1 to bit RA

0x60 = 0x08

Repeat for All 5 Coefficients

top_val =

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

mid_val =

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

bot_val =

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

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