參數(shù)資料
型號(hào): CL-PS7500FE
廠商: CIRRUS LOGIC INC
元件分類: 微控制器/微處理器
英文描述: System-on-a Chip for Internet Appliance
中文描述: 32-BIT, RISC MICROCONTROLLER, PQFP240
封裝: PLASTIC, QFP-240
文件頁(yè)數(shù): 6/251頁(yè)
文件大?。?/td> 2367K
代理商: CL-PS7500FE
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CL-PS7500FE
System-on-a-Chip for Internet Appliance
June 1997
5
ADVANCE DATA BOOK v2.0
TABLE OF CONTENTS
7.7
7.8
7.9
7.10
7.11
7.12
7.13
MEMORY MAP......................................................................................................................66
MEMORY SUBSYSTEMS.....................................................................................................67
9.1
ROM Interface ..................................................................................................................................67
9.1.1
ROM Bank Configuration and Timing...............................................................................68
9.2
DRAM Interface................................................................................................................................69
9.2.1
DRAM Control Registers ..................................................................................................69
9.2.2
DRAM Address Multiplexing............................................................................................70
9.2.3
Selection Between 16- and 32-bit DRAM.........................................................................70
9.2.4
EDO and Timing Mode Selection .....................................................................................71
9.2.5
DRAM Refresh..................................................................................................................72
9.2.6
DRAM Self-Refresh..........................................................................................................73
9.2.7
Non-Sequential Access Time and RAS Precharge ..........................................................73
9.3
DMA Channels .................................................................................................................................74
9.3.1
Video DMA.......................................................................................................................74
9.3.2
Cursor DMA.....................................................................................................................75
9.3.3
Sound DMA .....................................................................................................................75
9.3.4
The Sound DMA State Machine.......................................................................................76
10. MEMORY AND I/O PROGRAMMERS’ MODEL...................................................................78
10.1
Introduction.......................................................................................................................................78
10.2
Register Summary............................................................................................................................78
10.3
Register Descriptions .......................................................................................................................81
10.3.1
IOCR (0x00) — I/O Control...............................................................................................81
10.3.2
KBDDAT (0x04) — Keyboard Data...................................................................................81
10.3.3
KBDCR (0x08) — Keyboard Control.................................................................................82
10.3.4
IOLINES (0x0C) — IOP[7:0] Port Control.........................................................................83
10.3.5
IRQSTA (0x10) — IRQ A Interrupts Status.......................................................................83
10.3.6
IRQRQA (0x14) — IRQ A Interrupts Request/Clear.........................................................84
10.3.7
IRQMSKA (0x18) — IRQ A Interrupts Mask.....................................................................84
10.3.8
SUSMODE (0x1C) — SUSPEND Mode...........................................................................85
10.3.9
IRQSTB (0x20) — IRQ B Interrupts Status ......................................................................85
10.3.10
IRQRQB (0x24) — IRQ B Interrupts Request ..................................................................86
10.3.11
IRQMSKB (0x28) — IRQ B Interrupts Mask.....................................................................86
10.3.12
STOPMODE (0x2C) — STOP Mode................................................................................87
10.3.13
FIQST (0x30) — FIQ Interrupts Status.............................................................................87
10.3.14
FIQRQ (0x34) — FIQ Interrupts Request.........................................................................87
10.3.15
FIQMSK (0x38) — FIQ Interrupts Mask ...........................................................................88
10.3.16
CLKCTL (0x3C) — Clock Control.....................................................................................88
10.3.17
T0low (0x40) — Timer 0 Low Bits.....................................................................................89
10.3.18
T0high (0x44) — Timer 0 High Bits...................................................................................89
10.3.19
T0GO (0x48) — Timer 0 Go Command............................................................................89
10.3.20
T0LAT (0x4C) — Timer 0 Latch Command.......................................................................89
Register 2: Level One Page Table (Write only).................................................................................64
Register 3: Domain Access Control (Write only) ..............................................................................64
Register 4: Reserved........................................................................................................................64
Register 5: Fault Status/Translation Lookaside Buffer Flush ............................................................65
Register 6: Fault Address/TLB Purge...............................................................................................65
Register 7: IDC Flush (Write only)....................................................................................................65
Registers 8–15: Reserved................................................................................................................65
8.
9.
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