UPD17244 View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD17244

4-BIT SINGLE-CHIP MICROCONTROLLERS FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTERS

NEC => Renesas Technology 

µPD17240, 17241, 17242, 17243, 17244, 17245, 17246

DIFFERENCES BETWEEN µPD17246 SUBSERIES, µPD17236 SUBSERIES, AND µPD17255

SUBSERIES (2/2)

Item

STOP mode release

condition

Carrier frequency

(fX = 4 MHz)

NRZ low-level period

setting modulo register

(NRZLTMM) and NRZ

high-level period setting

modulo register

(NRZHTMM)

µPD17246 Subseries

µPD17236 Subseries

µPD17225 Subseries

<1> When any of pins P0A0

to P0A3 goes low

<2> When pins P0B0 to P0B3,

P0C0 to P0C3, and P0D0

to P0D3 are used as input

pins and when any of

them goes low

<3> When an interrupt

request (IRQ) of the

interrupt for which the IP

flag is set is generated at

the rising edge or falling

edge of the INT pin

<4> When P0E0 to P0E3 are

used as input pins when

a key matrix is used and

when any of these pins

goes low

<5> When P1A0 to P1A2 and

P1B0 are used as input

pins when a key matrix is

used and when the level

of any of these pins

equals the set clear level

<1> When any of pins P0A0

to P0A3 goes low

<2> When pins P0B0 to P0B3,

P0C0 to P0C3, and P0D0

to P0D3 are used as

input pins and when any

of them goes low

<3> When an interrupt

request (IRQ) of the

interrupt for which the IP

flag is set is generated

at the rising edge or

falling edge of the INT

pin

When any of pins P0A0 to

P0A3 and P0B0 to P0B3 goes

low

Selected by register file

(after reset: fX/2)

<1> If carrier generation clock

is fX/2: 3.9 kHz to 1 MHz

<2> If carrier generation clock

is fX: 7.8 kHz to 2 MHz

<3> If carrier generation clock

is 2fX: 15.6 kHz to 4 MHz

Selected by mask option

<1> If carrier generation

clock is fX/2: 7.8 kHz to

1 MHz

<2> If carrier generation

clock is fX: 15.6 kHz to

2 MHz

7.8 kHz to 1 MHz

• NRZLTMM: 8 bits

(REM output control bit is bit

1 of register file at address

12H)

• NRZHTMM: 8 bits

• NRZLTMM: 7 bits (bit 7 is REM output control bit)

• NRZHTMM: 7 bits (bit 7 is fixed to 0)

4

Data Sheet U15002EJ1V0DS

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