EM78M611E
Universal Serial Bus Series Microcontroller
Product Specification
(V1.11) 04.20.2007
••••
17
(This specification is subject to change without further notice)
8.2.3.2 CONT (Control Register)
Default Value: (0B_0011_1111)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
LED
INT
TSR2
TSR1
TSR0
PSR2
PSR1
PSR0
Except for Bit 6 (Interrupt enable control bit), the CONT register can be read by the
instruction "CONTR" and written by the instruction “CONTW".
CONT [0~2] Watchdog Timer prescaler bits. These three bits are used as the
Watchdog Timer prescaler.
CONT [3~5] TCC Timer prescaler bits.
The relationship between the prescaler value and these bits are shown below:
PSR2/TSR2
PSR1/TSR1
PSR0/TSR0
TCC Rate
WDT Rate
0
0
0
1: 2
1: 1
0
0
1
1: 4
1: 2
0
1
0
1: 8
1: 4
0
1
1
1: 16
1: 8
1
0
0
1: 32
1: 16
1
0
1
1: 64
1: 32
1
1
0
1: 128
1: 64
1
1
1
1: 256
1: 128
NOTE
WDT Timing base is “Power-on time”. Set by the code option [2, 1.]
Ex. Code option [2 ,1] = 01 (2ms), and Prescaler = 1:128.
WDT overflow time is: 2mS * 2^7 = 256 mS
CONT [6] Interrupt enable control bit. This bit toggles Interrupt function between
enable and disable. It is set to 1 by the interrupt disable instruction "DISI"
and reset by the interrupt enable instructions "ENI" or "RETI."
0
: Disable the Interrupt function
1
: Enable the Interrupt function
CONT [7] LED bit. This bit is used to enable the LED sink capacity of P76 and P77.
0
: Disable the LED sink capacity of P76, P77
1
: Enable the LED sink capacity of P76, P77
