UPD17073 NEC, UPD17073 Datasheet - Page 56

• Manufacturer Part Number: UPD17073
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM
• Manufacturer: NEC

9.2.2 Table reference instruction (“MOVT DBF, @AR”)
register are incorporated into the data buffer.
the addresses of the program memory.
9.2.3 Peripheral hardware control instructions (“PUT” and “GET”)
9.3 List of Peripheral Hardware and Data Buffer Functions
9.4 Notes on Using Data Buffer
in respect with the unused peripheral addresses, write-only peripheral registers (only when using PUT), and read-
only peripheral registers (only when using GET):
56
Serial interface
Address register
(AR)
IF counter
(1) GET DBF, p
(2) PUT p, DBF
(1) An “undefined value” is read when a write-only register is read.
(2) Nothing is changed even when data is written to a read-only register.
(3) An “undefined value” is read when an unused address is read. Nothing is changed when data is written to
When this instruction is executed, the contents of the program memory addressed by the contents of the address
The program memory addresses to which table reference can be executed are addresses 0000H-0FFFH, i.e., all
The operations of the “PUT” and “GET” instructions are as follows:
Table 9-1 lists the peripheral hardware and data buffer functions.
When transferring data with the peripheral hardware through the data buffer, keep in mind the following three points
Peripheral
hardware
Reads the data of the peripheral register addressed by p to the data buffer.
Sets the data of the data buffer to the peripheral register addressed by p.
this address.
Presettable shift
register
Address register
IF counter data
register
Peripheral register transferring data with data buffer
Table 9-1. Relation between Peripheral Hardware and Data Buffer
Name
SIOSFR
AR
IFC
Symbol
Peripheral
address
03H
40H
43H
of PUT/GET
PUT/
GET
PUT/
GET
GET
instruction
Execution
No. of data
buffer I/O
bits
16
16
8
No. of
actual
bits
12
16
8
Function
Sets serial out data
and reads serial in data
address register
Reads count value of
IF counter
Transfers data with
PD17072,17073
Outline