UPD17217CT-XXX Ver la hoja de datos (PDF) - NEC => Renesas Technology

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UPD17217CT-XXX

4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER

NEC => Renesas Technology 

µPD17215, 17216, 17217, 17218

Table 2-2 Relations between Hardware Peripherals and Data Buffer

Hardware

Peripherals

8-Bit Timer

Remote

Controller

Carrier

Generator

Address

Register

Name

8-bit counter

8-bit modulo

register

NRZ low

level period

setting

modulo

register

NRZ high

level period

setting

modulo

register

Address

register

Peripheral Register Transferring Data with Data Buffer

Symbol

Peripheral

Address

Data

Buffer

PUT/GET

TMC

05H

DBF0, DBF1 GET only

TMM

06H

DBF0, DBF1 PUT only

NRZLTMM

PUT

GET

03H

DBF0, DBF1

NRZHTMM

AR

PUT (clear bit 3

of DBF1 to 0)

04H

DBF0, DBF1 GET (bits 3 of

DBF1 is always 0)

PUT (bits 0 to 3 of

AR3 and bit 3 of

40H

DBF0-DBF3 AR2 are any)*1

GET (bits 0 to 3 of

AR3 and bit 3 of

AR2 are always 0)*2

*1: In the µPD17216: bits 0 to 3 of AR3 are any, in the µPD17217, 17218: bits 1 to 3 of AR3 are any

2: In the µPD17216: bits 0 to 3 of AR3 are always 0, in the µPD17217, 17218: bits 1 to 3 of AR3 are always 0

(2) Table reference

A MOVT instruction reads constant data from a specified location of the program memory (ROM) and sets it

in the data buffer.

The function of the MOVT instruction is explained below.

MOVT DBF,@AR: Reads data from a program memory location pointed to by the address register (AR) and

sets it in the data buffer (DBF).

DBF 3

Data buffer

DBF 2

DBF 1

DBF 0

MOVT DBF, @ AR

Program memory (ROM)

16 bits

b15

b0

19

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