EP7212 Datasheet, PDF (5/136 Pages) Cirrus Logic – HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI)

EP7212
EP7212
TABLE OF CONTENTS
1. CONVENTIONS ...................................................................................................................... 11
1.1 Acronyms and Abbreviations ............................................................................................ 11
1.2 Units of Measurement ...................................................................................................... 12
1.3 General Conventions ........................................................................................................ 12
1.4 Pin Description Conventions ............................................................................................. 12
2. PIN INFORMATION ................................................................................................................ 13
2.1 208-Pin LQFP Pin Diagram .............................................................................................. 13
2.2 Pin Descriptions ................................................................................................................ 14
2.2.1 External Signal Functions ................................................................................... 14
2.2.2 SSI/Codec/DAI Pin Multiplexing ............................................................................. 18
2.2.3 Output Bi-Directional Pins .................................................................................... 18
3. FUNCTIONAL DESCRIPTION ............................................................................................... 19
3.1 CPU Core .......................................................................................................................... 20
3.2 State Control ..................................................................................................................... 21
3.2.1 Standby State .......................................................................................................... 21
3.2.1.1 UART in Standby State ............................................................................... 22
3.2.2 Idle State ................................................................................................................. 23
3.2.3 Keyboard Interrupt ................................................................................................... 23
3.3 Power-Up Sequence ......................................................................................................... 23
3.4 Resets ............................................................................................................................... 24
3.5 Clocks ............................................................................................................................... 25
3.5.1 On-Chip PLL ............................................................................................................ 25
3.5.1.1 Characteristics of the PLL Interface ............................................................ 25
3.5.2 External Clock Input (13 MHz) ................................................................................ 26
3.5.3 Dynamic Clock Switching When in the PLL Clocking Mode .................................... 26
3.6 Interrupt Controller ............................................................................................................ 27
3.6.1 Interrupt Latencies in Different States ..................................................................... 27
3.6.1.1 Operating State ........................................................................................... 27
3.6.1.2 Idle State ..................................................................................................... 29
3.6.1.3 Standby State .............................................................................................. 29
3.7 EP7212 Boot ROM .......................................................................................................... 29
3.8 Memory and I/O Expansion Interface ............................................................................... 30
3.9 DRAM Controller with EDO Support ................................................................................. 31
3.10 CL-PS6700 PC Card Controller Interface ....................................................................... 33
3.11 Endianness ..................................................................................................................... 36
3.12 Internal UARTs (Two) and SIR Encoder ......................................................................... 36
3.13 Serial Interfaces .............................................................................................................. 38
Contacting Cirrus Logic Support
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