UPD17P136ACT datasheet(63/292 Pages) NEC

номер детали	UPD17P136ACT

подробное описание детали	4-BIT SINGLE-CHIP MICROCONTROLLER

PDF	292 Pages

Scroll/Zoom	100%

производитель	NEC [NEC]

домашняя страница	http://www.nec.com/

Logo

63 / 292 page

CHAPTER 7 SYSTEM REGISTER (SYSREG)

(3) Indirect branch instruction (BR @AR)

When the BR @AR instruction is executed, the program branches to the address in program memory specified

by the value in the address register.

(4) Indirect subroutine call (CALL @AR)

When the CALL @AR instruction is executed, the subroutine located at the address in program memory

specified by the value in the address register is called.

(5) Address register used as a peripheral hardware register

The address register can be manipulated 4 bits at a time by using data memory manipulation instructions. The

address register can also be used as a peripheral hardware register for transferring 16-bit data to the data

buffer. In other words, by using the PUT AR, DBF and GET DBF AR instructions, the address register can

be used to transfer 16-bit data to the data buffer.

Note that the data buffer is allocated in addresses 0CH to 0FH of BANK0 in data memory.

Figure 7-4. Address Register Used as a Peripheral Circuit

0123456789

DBF3 DBF2 DBF1DBF0

AR3 AR2 AR1 AR0

System register

(BANK0)

Column address

Data buffer

Address register

16-bit data transfer available

UPD17P136ACT датащи(PDF) 63 Page - NEC