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UPD17708 Datasheet(PDF) 87 Page - NEC

Part # UPD17708
Description  4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DEDICATED HARDWARE FOR DIGITAL TUNING SYSTEM
PDF  356 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD17708 Datasheet(HTML) 87 Page - NEC

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9.2.2 Table reference instruction (“MOVT DBF, @AR”)
This instruction moves the contents of the program memory addressed by the contents of the address register
to the data buffer.
The number of bits transferred by the table reference instruction can be specified by MOVT selection register
(address 07H) of the control registers.
When 8-bit data is transferred, it is read to DBF1 and 0.
When the table reference instruction is used, one stack level is used.
All the addresses of the program memory can be referenced by the table reference instruction.
9.2.3 Peripheral hardware control instructions (“PUT” and “GET”)
The operations of the “PUT” and “GET” instructions are as follows:
(1) GET DBF, p
Reads the data of a peripheral register addressed by “p” to the data buffer.
(2) PUT p, DBF
Sets the data of the data buffer to a peripheral register addressed by “p”.
9.3 Relationships between Peripheral Hardware and Data Buffer
Table 9-1 shows the relationships between the peripheral hardware and the data buffer.



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