Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

UPD784938 Datasheet(PDF) 85 Page - NEC

Part # UPD784938
Description  16-Bit Single-Chip Microcontrollers
Download  733 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD784938 Datasheet(HTML) 85 Page - NEC

Back Button UPD784938 Datasheet HTML 81Page - NEC UPD784938 Datasheet HTML 82Page - NEC UPD784938 Datasheet HTML 83Page - NEC UPD784938 Datasheet HTML 84Page - NEC UPD784938 Datasheet HTML 85Page - NEC UPD784938 Datasheet HTML 86Page - NEC UPD784938 Datasheet HTML 87Page - NEC UPD784938 Datasheet HTML 88Page - NEC UPD784938 Datasheet HTML 89Page - NEC Next Button
Zoom Inzoom in Zoom Outzoom out
 85 / 733 page
background image
85
CHAPTER 3 CPU ARCHITECTURE
Preliminary User’s Manual U13987EJ1V0UM00
(4) Auxiliary carry flag (AC)
The AC flag is set (to 1) when there is a carry out of bit 3 or a borrow into bit 3 as the result of an operation, and reset (to
0) otherwise.
This flag is used when the ADJBA or ADJBS instruction is executed.
(5) Register set selection flag (RSS)
The RSS flag specifies the general-purpose registers that function as X, A, C, and B, and the general-purpose register pairs
(16-bit) that function as AX and BC.
This flag is provided to maintain compatibility with the 78K/III Series, and must be set to 0 except when using a 78K/III Series
program.
(6) Zero flag (Z)
The Z flag records the fact that the result of an operation is “0”.
It is set (to 1) when the result of an operation is “0”, and reset (to 0) otherwise. The status of the Z flag can be tested with
a conditional branch instruction.
(7) Sign flag (S)
The S flag records the fact that the MSB is “1” as the result of an operation.
It is set (to 1) when the MSB is “1” as the result of an operation, and reset (to 0) otherwise. The status of the S flag can be
tested with a conditional branch instruction.
(8) Register bank selection flag (RBS0 to RBS2)
This is a 3-bit flag used to select one of the 8 register banks (register bank 0 to register bank 7) (see Table 3-4).
It stores 3-bit information which indicates the register bank selected by execution of a SEL RBn instruction, etc.
Table 3-4. Register Bank Selection
RBS2
RBS1
RBS0
Specified Register Bank
0
0
0
Register bank 0
0
0
1
Register bank 1
0
1
0
Register bank 2
0
1
1
Register bank 3
1
0
0
Register bank 4
1
0
1
Register bank 5
1
1
0
Register bank 6
1
1
1
Register bank 7
(9) User flag (UF)
This flag can be set and reset in the user program, and used for program control.


Similar Part No. - UPD784938

ManufacturerPart #DatasheetDescription
logo
NEC
UPD784938A NEC-UPD784938A Datasheet
371Kb / 52P
   16-BIT SINGLE-CHIP MICROCONTROLLER
logo
Renesas Technology Corp
UPD784938AGF-XXX-3BA RENESAS-UPD784938AGF-XXX-3BA Datasheet
692Kb / 104P
   MOS INTEGRATED CIRCUITS
2001
More results

Similar Description - UPD784938

ManufacturerPart #DatasheetDescription
logo
Renesas Technology Corp
UPD78F1502AGK-GAK-AX RENESAS-UPD78F1502AGK-GAK-AX Datasheet
6Mb / 1031P
   16-Bit Single-Chip Microcontrollers
logo
NEC
UPD784214A NEC-UPD784214A Datasheet
561Kb / 50P
   16-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784915A NEC-UPD784915A Datasheet
446Kb / 86P
   16-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784915B NEC-UPD784915B Datasheet
384Kb / 86P
   16-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784224 NEC-UPD784224 Datasheet
687Kb / 92P
   16/8-BIT SINGLE-CHIP MICROCONTROLLERS
logo
Siemens Semiconductor G...
C167CR-16RM SIEMENS-C167CR-16RM Datasheet
1Mb / 67P
   16-Bit CMOS Single-Chip Microcontrollers
logo
NEC
UPD78363A NEC-UPD78363A Datasheet
502Kb / 96P
   16/8-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784035Y NEC-UPD784035Y Datasheet
503Kb / 94P
   16-/8-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784218 NEC-UPD784218 Datasheet
617Kb / 92P
   16-/8-BIT SINGLE-CHIP MICROCONTROLLERS
logo
Siemens Semiconductor G...
C161V SIEMENS-C161V_96 Datasheet
3Mb / 260P
   16-Bit CMOS Single-Chip Microcontrollers
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100  ...More


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com