UPD65 NEC [NEC], UPD65 Datasheet - Page 24

• Manufacturer Part Number: UPD65
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC [NEC]

24
0/1
b
Notes 1. When setting HALT # 110B, configure a key matrix by using the K
Cautions 1. The internal reset takes effect when the HALT instruction is executed with an operand value
0
1
3
Operand Value of
HALT Instruction
Any of the
combinations of
b
2
b
0
0
1
1
b
2. At least one of the S
2
1
b
0
internal reset takes effect at the time of program hang-up.
follows:
S
S
2. If STOP mode is set when the timer’s down counter is not 0 (timer operating), the system
3. Write the NOP instruction as the first instruction after STOP mode is released.
above
0
2
Table 5-3. Standby Mode Setup (HALT #b
, S
other than that above or when the precondition has not been satisfied when executing the
HALT instruction.
is placed in STOP mode only after all the 10 bits of the timer’s down counter and the timer
output permit flag are cleared to 0.
pin
b
0
1
1
0
1
1
pins : INPUT mode (specified by bits 0 and 2 of the P4 register)
b
0
1
0
1
0
: Use of STOP mode release enabled (specified by bit 3 of the P4 register)
Setting Mode
STOP
STOP
STOP
STOP
HALT
0
, S
Note 1
1
and S
All K
All K
The K
Data Sheet U14380EJ2V0DS00
2
pins (the pin used for releasing the standby) must be specified as
I/O
I/O
I/O0
Precondition for Setup
[The following condition is added in addition to the above.]
pins are high-level output.
pins are high-level output.
pin is high-level output.
—
—
3
b
2
b
1
b
0
B) and Release Conditions
High level is input to at least one
of K
High level is input to at least one
of K
High level is input to at least one
of K
High level is input to at least one
of S
When the timer’s down counter is 0
I/O0
I
I
I
0
, S
pins.
pins.
pins.
pin and the K
1
Release Condition
and S
2
pins
I
Note 2
pin so that an
PD64A, 65
.