em78p811 ELAN Microelectronics Corp, em78p811 Datasheet - Page 14

• Manufacturer Part Number: em78p811
• Description: 8-bit Micro-controller
• Manufacturer: ELAN Microelectronics Corp

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* This specification is subject to be changed without notice.
8. RB(DTMF tone row and column register) (read/write)
instruction.
* Bit7 IDLE: sleep mode selection bit
0/1=sleep mode/IDLE mode. This bit will decide SLEP instruction which mode to go.
These two modes can be waken up by TCC clock or Watch Dog or PORT9 and run from “SLEP” next
TCC time out
WDT time out
Port9 wake-up
c7
7
bit 3~0
1110
1101
1011
0111
Column freq
bit 7~4
* Bit 0 - Bit 3 are row-frequency tone.
* Bit 4 - Bit 7 are column-frequency tone.
* Initial RB is equal to high. Bit 7 ~ 0 are all "1" , turn off DTMF power .
c6
6
c5
5
c4
Row freq
699.2Hz
771.6Hz
854Hz
940.1Hz
32.768K
4
SLEEP mode
RA(7,6)=(0,0)
+ SLEP
X
RESET
RESET
r3
3
r2
2
Fig8. The relation between 32.768K and 3.679K .
1
4
7
*
1203Hz
1110
r1
1
IDLE mode
RA(7,6)=(1,0)
+ SLEP
Wake-up
+ Interrupt
+ Next instruction
Wake-up
+ Next instruction
Wake-up
+ Next instruction
3.679M
r0
0
PLL
/358E
2
5
8
0
1331.8Hz
1101
13
3
6
9
#
1472Hz
1011
switch
GREEN mode
RA(7,6)=(x,0)
no SLEP
Interrupt
RESET
RESET
1
0
A
B
C
D
1645.2Hz
0111
To system clock
NORMAL mode
RA(7,6)=(x,1)
no SLEP
Interrupt
RESET
RESET
8-bit OTP Micro-controller
EM78P811