W83L951DG Datasheet, PDF (81/112 Pages) Winbond – Mobile Keyboard and Embedded Controller

W83L951DG/W83L951FG
Bit 1: Repeat Interrupt Mask Enable
0 – Enable.
1 – Disable.
Bit 0: Rx Signal Invert Enable
Enable CIR Rx signal Convert Function
0 – Enable.
1 – Disable.
6.11.1.2 Baud Rate Divider (CIRBRD) (Default Value: 0101_0101)
Input clock=24MHz :
The Transmit and Receive Bit Rate Divider register is used to extract a serial NRZ data stream for the
CIrCC SCE. The divider is eight bits wide. The input clock to the Bit Rate Divider is 100 KHz (Carrier
Frequency Divider input clock 16). The relationship between the Bit Rate Divider (BRD) and the Bit
Rate (Fb) is as follows:
BRD = (.1MHz/Fb) – 1
For example, program the Bit Rate Divider with 55 ('37'Hex) for a .562ms Remote Control bit cell like
for the NEC remote control frame format: Fb = 1.786 KHz. This is ~.5% accuracy. Table 9 contains
representative BRD vs. BitRate relationships. The Bit Rate range is 100 KHz to 390.625Hz.
Input clock=12MHz :
The Transmit and Receive Bit Rate Divider register is used to extract a serial NRZ data stream for the
CIrCC SCE. The divider is eight bits wide. The input clock to the Bit Rate Divider is 50 KHz (Carrier
Frequency Divider input clock 16). The relationship between the Bit Rate Divider (BRD) and the Bit
Rate (Fb) is as follows:
BRD = (.05MHz/Fb) – 1
For example, program the Bit Rate Divider with 55 ('37'Hex) for a .562ms Remote Control bit cell like
for the NEC remote control frame format: Fb = 0.893 KHz. This is ~.5% accuracy. Table 9 contains
representative BRD vs. BitRate relationships. The Bit Rate range is 50 KHz to 190Hz.
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Publication Release Date: August 2006
Revision 1.0