CL-PS7110 View Datasheet(PDF) - Cirrus Logic

Part Name

Description

Manufacturer

CL-PS7110

Low-Power System-on-a-Chip

Cirrus Logic 

CL-PS7110

Low-Power System-on-a-Chip

1. FUNCTIONAL DESCRIPTION

1.1 Overview

The CL-PS7110 is a single-device embedded controller designed to be used in ultra-low-cost applications

such as a hand-held personal organizers and hand-held internet browsers. There are other devices

offered by Cirrus Logic (http://www.cirrus.com) such as fax/modem chipsets, IR chipsets, codecs, etc.,

that can be used around the CL-PS7110 to build a complete hand-held organizer. The CL-PS7110 oper-

ates at both 3 V and 5 V. However, the AC timings shown in this data book (v1.5) reflect 3-V operation.

Figure 1-1 shows a simplified functional block diagram of the CL-PS7110. All external memory and

peripheral devices are connected to the 32-bit data bus, using the external 28-bit address bus and control

signals. Bus transfer times can be extended using the EXPRDY signal to lengthen bus cycles. The max-

imum burst transfer rate of the external bus is approximately 70 Mbytes/sec.

3.6864 MHz

32.786 kHz

EINT[1–3],

FIQ

BATOK, EXTPWR

PWRFL, BATCHG

PORTS A B C D — 8-BIT

PORT E — 4-BIT

KEYBOARD COLUMN

DRIVES (0–7)

BUZZER DRIVE

DC TO DC

CLK, SYNC, IN,

OUT, SMPCLK

CLK, SYNC IN,

OUT

18.432-MHz

PLL

32.768-kHz

OSCILLATOR

INTERRUPT

CONTROLLER

POWER

MANAGEMENT

GPIO

PSU

CONTROL

SYNCHRONOUS

SERIAL I/O

CODEC

INTERFACE

ARM710A

ARM7

µP CORE

8-KBYTE

CACHE

MMU

COUNTERS

(2)

RTC

INTERNAL DATA BUS

STATE

CONTROL

ROM/EXPANSION

CONTROL

DRAM

CONTROLLER

INTERNAL

ADDRESS BUS

MUX

D0–D31

POR, RUN,

RESET,

WAKEUP

EXPCLK, WORD,

CD[0–7], EXPRDY,

WRITE

MOE, MWE

RAS[0–3], CAS[0–3]

A[0–27],

DRA[0–12]

LCD

CONTROLLER

LCD DRIVE

UART

IRDA

LED AND PHOTO-

DIODE

RS232 INTERFACE

Figure 1-1. Functional Block Diagram

The core-logic functionality is built around an ARM710A microprocessor and 8 Kbytes of cache. At 18.432

MHz (for 3-V operation) and with an on-chip 8-Kbyte cache (four-way set-associative), the CL-PS7110

delivers approximately 15 MIPS of sustained performance (18.4 MIPS peak). This is approximately the

same as a 33-MHz, ’486-based PC.

May 1997

DATA BOOK v1.5

11

FUNCTIONAL DESCRIPTION

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