Freescale-semiconductor DSP56366 User Manual download pdf (Page 209)

ESAI_1 Programming Model

DSP56366 24-Bit Digital Signal Processor User Manual, Rev. 4

Freescale Semiconductor 9-9

9.3.4 ESAI_1 Receive Clock Control Register (RCCR_1)

The read/write Receive Clock Control Register (RCCR_1) controls the ESAI_1 receiver clock generator

bit and frame sync rates, word length, and number of words per frame for the serial data.

Hardware and software reset clear all the bits of the RCCR_1 register.

9.3.4.1 RCCR_1 Rx High Freq. Clock Divider (RFP3-RFP0) - Bits 14–17

Since the ESAI_1 does not have the receiver high frequency clock pin, the RFP3–RFP0 bits simply specify

an additional division ratio in the clock divider chain. See Figure 9-4.

9.3.4.2 RCCR_1 Rx High Freq. Clock Polarity (RHCKP) - Bit 20

The ESAI_1 does not have the receiver high frequency clock pin. It it recommended that RHCKP should

be kept cleared.

9.3.4.3 RCCR_1 Rx High Freq. Clock Direction (RHCKD) - Bit 23

The ESAI_1 does not have the receiver high frequency clock pin. RHCKD must be set for proper ESAI_1

receiver section operation.

11109876543210

Y:$FFFF98 RDC2 RDC1 RDC0 RPSR RPM7 RPM6 RPM5 RPM4 RPM3 RPM2 RPM1 RPM0

23 22 21 20 19 18 17 16 15 14 13 12

RHCKD RFSD RCKD RHCKP RFSP RCKP RFP3 RFP2 RFP1 RFP0 RDC4 RDC3

Reserved bit - read as zero; should be written with zero for future compatibility.

Figure 9-7 RCCR_1 Register

Table 9-3 Receiver Clock Sources (asynchronous mode only)

RHCKD RFSD RCKD

Receiver

Bit Clock

Source

OUTPUTS

0 X X Reserved

1 0 0 SCKR_1

1 0 1 INT SCKR_1

1 1 0 SCKR_1 FSR_1

1 1 1 INT FSR_1 SCKR_1

1 2 ... 204 205 206 207 208 209 210 211 212 213 214 ... 365 366

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Freescale-semiconductor DSP56366 User Manual Page 209