STA321 datasheet(45/157 Pages) STMICROELECTRONICS

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STA321

Digital processing stage

Doc ID 15351 Rev 3

45/157

6.14.2

Writing a set of five coefficients/locations to RAM

Write RAM address of b0 to registers START_ADDR2 and START_ADDR1

(b0) Write 8 MSBs of coefficient in register I2CB0_TOP

Write 8 middle bits of coefficient in register I2CB0_MID

Write 8 LSBs of coefficient in register I2CB0_BOT

(b1) Write 8 MSBs of coefficient in register I2CB1_TOP

Write 8 middle bits of coefficient in register I2CB1_MID

Write 8 LSBs of coefficient in register I2CB1_BOT

(b2) Write 8 MSBs of coefficient in register I2CB2_TOP

Write 8 middle bits of coefficient in register I2CB2_MID

Write 8 LSBs of coefficient in register I2CB2_BOT

(a1) Write 8 MSBs of coefficient in register I2CA1_TOP

Write 8 middle bits of coefficient in register I2CA1_MID

Write 8 LSBs of coefficient in register I2CA1_BOT

(a2) Write 8 MSBs of coefficient in register I2CA2_TOP

Write 8 middle bits of coefficient in register I2CA2_MID

Write 8 LSBs of coefficient in register I2CA2_BOT

Write 1 to bit WA in register PROCCTRL.

Figure 27.

Writing five contiguous RAM locations

START_ADDR[8:0]

Write address to

of coefficient

Write top 8 bits

of coefficient

Write middle 8 bits

of coefficient

Write bottom 8 bits

0x61 = address[8]

0x62 = address[7:0]

Repeat for all 5 coefficients

0x60 = 0x02

in PROC_CTRL

Write 1 to bit WA

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

= bot_val

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

= mid_val

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

= top_val

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