UPD6600A NEC, UPD6600A Datasheet - Page 18

• Manufacturer Part Number: UPD6600A
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC

18
SWITCH FOR DATA
Caution
Caution
(1)
(2)
(3)
K
I/O
<1> K
<2> HALT releasing condition specification (S-IN, K
Pull-down resistor
When 0 ... Not provided (OFF)
When 1 ... Provided (ON)
Modulation duty (at f
When 0 ... 1/2 duty
When 1 ... 1/3 duty
Hang-up detection
input/output selection
To use a pin as a key source of a key matrix, be sure to set the switch to ON by mask option.
Be sure to specify the HALT mode of the unused releasing condition to be unused (set).
K
K
K
K
K
K
K
K
If the switch for hang-up detection K
HALT (STOP) mode, the K
mode).
When 0 ... No reset function (OFF)
When 1 ... Reset function (ON)
If the condition specified by mask option to be unused is satisfied in the HALT mode, the system is reset.
When 0 ... Used
When 1 ... Unused
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
I/O
ALL
output signal
output signal
output signal
output signal
output signal
output signal
output signal
output signal
Figure 17-1. Hang-up Detection K
OSC
/12)
I/O
pin is in input mode, or if at least one of the K
I/O
ALL is set to ON (1) by mask option, the system is reset if, in oscillation
I/O
I/O
, K
ALL Configuration Diagram
I
)
Hang-up detection
K
(Mask option)
I/O
ALL switch
V
DD
I/O
pins is low (AC pin discharge
PD6124A, 6600A
To RESET circuit