MG74PG1A08 Datasheet, PDF (4/127 Pages) Megawin Technology Co., Ltd – Interrupt controller

Content
Features ............................................................................................................ 2
Content ............................................................................................................ 4
1. General Description.................................................................................... 7
2. Block Diagram ............................................................................................ 8
3. Special Function Register........................................................................... 9
3.1. SFR Map ...............................................................................................................9
3.2. SFR Bit Assignment ............................................................................................10
4. Pin Configurations .................................................................................... 11
4.1. Package Instruction.............................................................................................11
4.2. Pin Description ....................................................................................................13
4.3. Alternate Function Redirection ............................................................................14
5. 8051 CPU Function Description ............................................................... 15
5.1. CPU Register ......................................................................................................15
5.2. CPU Timing.........................................................................................................16
5.3. CPU Addressing Mode........................................................................................17
6. Memory Organization ............................................................................... 18
6.1. On-Chip Program OTP........................................................................................18
6.2. On-Chip Data RAM .............................................................................................19
6.3. Declaration Identifiers in a C51-Compiler............................................................21
7. Data Pointer Register (DPTR) .................................................................. 22
8. System Clock ........................................................................................... 23
8.1. Clock Structure....................................................................................................24
8.2. Clock Register.....................................................................................................24
9. Watch Dog Timer (WDT) .......................................................................... 27
9.1. WDT Structure ....................................................................................................27
9.2. WDT during Idle and Power Down ......................................................................27
9.3. WDT Register......................................................................................................27
9.4. WDT Hardware Option ........................................................................................29
10. System Reset ........................................................................................... 30
10.1. Reset Source ......................................................................................................30
10.2. Power-On Reset..................................................................................................30
10.3. External Reset.....................................................................................................31
10.4. Software Reset....................................................................................................31
10.5. Brown-Out Reset.................................................................................................32
10.6. WDT Reset..........................................................................................................33
11. Power Management ................................................................................. 34
11.1. Brown-Out Detector.............................................................................................34
11.2. Power Saving Mode ............................................................................................35
11.2.1. Slow Mode ................................................................................................................. 35
11.2.2. Sub-Clock Mode......................................................................................................... 35
11.2.3. Watch Mode ............................................................................................................... 35
11.2.4. Monitor Mode ............................................................................................................. 35
11.2.5. Idle Mode ................................................................................................................... 35
11.2.6. Power-down Mode ..................................................................................................... 36
11.2.7. Interrupt Recovery from Power-down ......................................................................... 37
11.2.8. Reset Recovery from Power-down ............................................................................. 37
4
MG74PG1A08 Data Sheet
MEGAWIN