upd17240 Renesas Electronics Corporation., upd17240 Datasheet - Page 29

• Manufacturer Part Number: upd17240
• Description: 4-bit Single-chip Microcontrollers For Small General-purpose Infrared Remote Control Transmitters
• Manufacturer: Renesas Electronics Corporation.

Notes 1. In the µ PD17240: Bits 0 to 3 of AR3 and bit 3 of AR2 are arbitrary values
8-bit timer
Remote controller
carrier generator
Address register
(2) Table referencing
Peripheral
Hardware
2. In the µ PD17240: Bits 0 to 3 of AR3 and bit 3 of AR2 are always 0
An 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
In the µ PD17241: Bits 0 to 3 of AR3 are arbitrary values
In the µ PD17242, 17243: Bits 1 to 3 of AR3 are arbitrary values
In the µ PD17244, 17245, 17246: Bits 2 to 3 of AR3 are arbitrary values
In the µ PD17241: Bits 0 to 3 of AR3 are always 0
In the µ PD17242, 17243: Bits 1 to 3 of AR3 are always 0
In the µ PD17244, 17245, 17246: Bits 2 to 3 of AR3 are always 0
DBF 3
Table 2-4. Relationship Between Peripheral Hardware and Data Buffer
8-bit counter
8-bit modulo
register
NRZ low-level
timer modulo
register
NRZ high-level
timer modulo
register
Address register
DBF 2
MOVT DBF, @ AR
Data buffer
Name
µ PD17240, 17241, 17242, 17243, 17244, 17245, 17246
sets it in the data buffer (DBF).
DBF 1
TMC
TMM
NRZLTMM
NRZHTMM
AR
Peripheral Register Transferring Data with Data Buffer
Symbol
DBF 0
Data Sheet U15002EJ1V1DS
b
15
Peripheral address Data buffer used
Program memory (ROM)
05H
06H
03H
04H
40H
16 bits
DBF0, DBF1
DBF0, DBF1
DBF0, DBF1
DBF0, DBF1
DBF0 to DBF3
b
0
GET only
PUT only
PUT
GET
PUT
GET
PUT
GET
Note 1
Note 2
PUT/GET
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