User Manual

Jennic
2 JN-DS-JN5148-001 1v2 © Jennic 2009
Preliminary
Contents
1 Introduction 6
1.1 Wireless Transceiver 6
1.2 RISC CPU and Memory 6
1.3 Peripherals 7
1.4 Block Diagram 8
2 Pin Configurations 9
2.1 Pin Assignment 10
2.2 Pin Descriptions 12
2.2.1 Power Supplies 12
2.2.2 Reset 12
2.2.3 32MHz Oscillator 12
2.2.4 Radio 12
2.2.5 Analogue Peripherals 13
2.2.6 Digital Input/Output 13
3 CPU 15
4 Memory Organisation 16
4.1 ROM 16
4.2 RAM 17
4.3 OTP eFuse Memory 17
4.4 External Memory 17
4.4.1 External Memory Encryption 18
4.5 Peripherals 18
4.6 Unused Memory Addresses 18
5 System Clocks 19
5.1 16MHz System Clock 19
5.1.1 32MHz Oscillator 19
5.1.2 24MHz RC Oscillator 19
5.2 32kHz System Clock 20
5.2.1 32kHz RC Oscillator 20
5.2.2 32kHz Crystal Oscillator 20
5.2.3 32kHz External Clock 20
6 Reset 21
6.1 Internal Power-on Reset 21
6.2 External Reset 22
6.3 Software Reset 22
6.4 Brown-out Detect 23
6.5 Watchdog Timer 23
7 Interrupt System 24
7.1 System Calls 24
7.2 Processor Exceptions 24
7.2.1 Bus Error 24
7.2.2 Alignment 24
7.2.3 Illegal Instruction 24
7.2.4 Stack Overflow 24
7.3 Hardware Interrupts 25