upd64a Renesas Electronics Corporation., upd64a Datasheet - Page 24

• Manufacturer Part Number: upd64a
• Description: 4-bit Single-chip Microcontroller For Infrared Remote Control Transmission
• Manufacturer: Renesas Electronics Corporation.

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 combination 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 runaway.
follows.
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
Table 5-3. Standby Mode Setting (HALT #b
S
S
other than that above or when the precondition has not been satisfied when executing the
HALT instruction.
enters STOP mode only after all the 10 bits of the timer’s down counter and the timer output
enable flag are cleared to 0.
b
0
1
1
0
0
2
1
, S
pin:
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 U14380EJ3V0DS00
2
pins (the pin used for releasing the standby) must be specified as
I/O
I/O
Precondition for Setting
I/O0
[The following conditions are 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 Conditions
and S
2
pins
I
Note 2
pin so that an
PD64A, 65
.