EM78P809N
8-Bit Microcontroller
Table 5
Max. Frequency
(Fc)
Max. Conversion
Rate per Bit
Max. Conversion
Rate
ADCK1:0 Operation Mode
0 0
0 1
1 0
1 1
Fc/4
Fc/16
1MHz
4MHz
8MHz
-
250kHz (4µs)
250kHz (4µs)
250kHz (4µs)
-
48us(20.8kHz)
48us(20.8kHz)
8us(20.8kHz)
-
Fc/32
Reserved
4.6 Time Base Timer and Keytone Generator
Registers for AD Converter Circuit
R_BANK Address NAME Bit 7
Bit 6 Bit 5 Bit 4 Bit 3
Bit 2
Bit 1
Bit 0
BANK 1
BANK 0
SPR
0X0E
0x0F
0x0F
TBKTC TEN
TCK1
TCK0
0
TBTEN TBTCK2 TBTCK1 TBTCK0
R/W
R/W
R/W
--
R/W
TBIF
R/W
TBIE
R/W
R/W
EXIF1
R/W
R/W
R/W
TCIF0
R/W
ISFR2
IMR2
0
0
0
0
UERRIF RBFF TBEF
R/W R/W R/W
UERRIE URIE UTIE
R/W R/W R/W
0
0
0
0
EXIE1
R/W
TCIE0
R/W
Output Enable (P63)
Output Latch
Data Output
D
Q
/TONE Pin
13
Fosc/2
12
Fosc/2
11
MUX
Fosc/2
10
Fosc/2
TCK1:0
TEN
2
TBKTC
Fig. 7. TONE Output Pin Configuration
Keytone output can generate 50% duty pulse for driving a piezo-electric buzzer. The
P63 must be set to “1” before keytone enable and it can be halted by setting P63 to “0”.
Product Specification (V1.0) 07.26.2005
• 31
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
