STC5455 datasheet(46/56 Pages) CONNOR-WINFIELD

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TM121

Rev:P1.3

Date: October 24, 2011

STC5455

Synchronous Clock for SETS

Data sheet

Preliminary

Field_Upgrade_Data, 0x71 (R/W)

Writes the firmware configuration data (7600 bytes) to this register one byte at a time to complete data loading.

Only the last written byte can be read from this register, regardless of how many times of reads performed.

Default value: 0

Field_Upgrade_Count, 0x72 (R)

Reads this register for how many bytes of 7600 bytes firmware configuration data has been loaded through the

Default value: 0

Field_Upgrade_Start, 0x74 (W)

If bit READY of the register Field Upgrade Status is set to 1, user can write three values to this register con-

secutively, with no intervening read/writes from/to other registers to start the process of field upgrade. 7600

bytes firmware configuration data can only start loading after the three values are written successfully.

MCLK_Freq_Reset, 0x7F (R/W)

Select accepted frequency of MCLK input by writing the associated value to this register three times consecu-

tively, with no intervening read/writes from/to other register. The associated values for the four accepted fre-

quency (10MHz, 12.8MHz, 19.2MHz, 20MHz) are as shown in table below. Three times of consecutive writes

Address

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

0x71

Field upgrade of firmware configuration data

Address

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

0x72

Lower 8 bits of byte count for firmware configuration data

0x73

Not used

Higher 5 bits of byte count for firmware configuration data

Address

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

0x74

Start field upgrade

Write Sequence

Bit 7 ~ 0

First

0x51

Second

0x52

Third

0x53

Address

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

0x7F

External oscillator frequency selection

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