UPD784937AGF-XXX-3BA View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD784937AGF-XXX-3BA

16-BIT SINGLE-CHIP MICROCONTROLLERS

NEC => Renesas Technology 

µPD784935A,784936A,784937A,784938A

7.2.2 Control registers

(1) Program counter (PC)

The contents of this 20-bit counter are automatically updated as a program is executed.

Figure 7-6. Format of Program Counter (PC)

19

0

PC

(2) Program status word (PSW)

This register holds the status of the CPU. Its contents are automatically updated as a program is executed.

Figure 7-7. Format of Program Status Word (PSW)

15

14

13

12

11

10

9

8

PSWH

UF RBS2 RBS1 RBS0

–

–

–

–

PSW

7

PSWL

S

6

5

4

3

2

1

0

Z

RSSNote AC

IE

P/V

0

CY

Note This flag is used to maintain compatibility with the 78K/III series. Keep this flag cleared to 0 except

when using the software written for the 78K/III series.

(3) Stack pointer (SP)

This is a 24-bit pointer that holds the first address of the stack.

Be sure to write 0 to the higher 4 bits of this pointer.

Figure 7-8. Format of Stack Pointer (SP)

23

20

0

SP

0000

28

Data Sheet U13572EJ2V0DS

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