C509-L_97 SIEMENS [Siemens Semiconductor Group], C509-L_97 Datasheet - Page 6
C509-L_97
Manufacturer Part Number
C509-L_97
Description
8-Bit CMOS Microcontroller
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.C509-L_97.pdf
(290 pages)
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Table of Contents
7
7.1
7.2
7.2.1
7.2.2
7.2.3
7.3
7.4
7.5
7.6
8
8.1
8.1.1
8.1.2
8.1.3
8.1.3.1
8.1.3.2
8.1.4
8.1.5
8.2
9
9.1
9.2
9.3
9.4
9.5
9.6
9.7
10
10.1
10.2
10.2.1
10.2.2
10.3
10.3.1
10.3.2
10.4
10.4.1
10.4.1.1
10.4.1.2
10.4.2
10.4.2.1
10.4.2.2
10.4.2.3
Semiconductor Group
Interrupt System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Structure of the Interrupt System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Interrupt Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
Interrupt Enable Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
Interrupt Priority Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10
Interrupt Request Flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11
Interrupt Priority Level Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17
How Interrupts are Handled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-19
External Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-21
Interrupt Response Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-22
Fail Save Mechanisms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Programmable Watchdog Timer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Input Clock Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
Watchdog Timer Control Flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
Starting the Watchdog Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
The First Possibility of Starting the Watchdog Timer . . . . . . . . . . . . . . . . . . . . . . . . 8-4
The Second Possibility of Starting the Watchdog Timer. . . . . . . . . . . . . . . . . . . . . . 8-4
Refreshing the Watchdog Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
Watchdog Reset and Watchdog Status Flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
Oscillator Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6
Power Saving Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
Hardware Enable for the Use of the Power Saving Modes . . . . . . . . . . . . . . . . . . . 9-2
Power Saving Mode Control Register PCON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
Idle Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
Software Power Down Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6
Slow Down Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7
Hardware Power Down Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
Hardware Power Down Mode Reset Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10
The Bootstrap Loader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
General Functions of the Bootstrap Loader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
Selection of Operating Mode 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-19
Selection of Operating Mode 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23
Selection of Operating Mode 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-24
Phase I: Check for Existing Custom Software in the External FLASH Memory . . 10-3
Custom Software Check by the Info Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3
Checksum Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7
Phase II: Automatic Serial Synchronization with the Host . . . . . . . . . . . . . . . . . . . 10-8
Automatic Synchronization Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-9
Baud Rates for Correct Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-12
Phase III: Serial Communication with the Host . . . . . . . . . . . . . . . . . . . . . . . . . . 10-13
Block Transfer Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-13
Header Block Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-15
Data and EOT Block Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-16
Operating Mode Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17
1-4
General Information
1997-10-01
C509-L
Page
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