EM78P809N
8-Bit Microcontroller
•
TBKTC − TBT/Keytone Control ( Address: 0Eh )
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
TEN
TCK1
TCK0
0
TBTEN
TBTCK2 TBTCK1 TBTCK0
Bit 7 ( TEN ) : Keytone enable control
TEN = “0” : Disable
TEN = “1” : Enable
Bit 6 ~ Bit 5 ( TCK1 ~ TCK0 ) : Keytone Output Clock Source Select
Clock Source
( Normal, Idle )
Keytone Output Frequency
TCK1
TCK0
( Fc = 8MHz )
0.976kHz
1.953kHz
3.906kHz
7.812kHz
0
0
1
1
0
1
0
1
Fc/213
Fc/212
Fc/211
Fc/210
Bit 3 ( TBTEN ) : Time Base Timer Enable Control
TBTEN = “0” : Disable
TBTEN = “1” : Enable
Bit 2 ~ Bit 0 ( TBTCK2 ~ TBTCK0 ) : Time Base Timer Clock Source Select
Clock Source
( Normal, Idle )
Interrupt Frequency
( Fc = 8MHz )
TBTCK2
TBTCK1
TBTCK0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
Fc/223
Fc/221
Fc/216
Fc/214
Fc/213
Fc/212
Fc/211
Fc/29
0.95Hz
3.81Hz
122.07Hz
488.28Hz
976.56Hz
1953.12Hz
3906.25Hz
15625Hz
•
•
Register Bank 2 ( R3 bits (7, 6) = (1, 0) )
URC1 − UART Control Register 1 ( Address: 05h )
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
URTD8 UMODE1 UMODE0 BRATE2 BRATE1 BRATE0
UTBE
TXE
Bit 7 ( URTD8 ) : Transmission data bit 8
Product Specification (V1.0) 07.26.2005
• 17
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
