EP9307-IR Cirrus Logic Inc, EP9307-IR Datasheet - Page 610

• Manufacturer Part Number: EP9307-IR
• Description: IC Universal Platform ARM9 SOC Prcessor
• Manufacturer: Cirrus Logic Inc
• Series: EP9r

Specifications of EP9307-IR

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, Ethernet, I²C, IrDA, Keypad/Touchscreen, SPI, UART/USART, USB
• Peripherals: AC'97, DMA, I&sup2:S, LCD, LED, MaverickKey, POR, PWM, WDT
• Number Of I /o: 14
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 3.6 V
• Data Converters: A/D 8x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 272-TFBGA
• Processor Series: EP93xx
• Core: ARM920T
• Data Bus Width: 32 bit
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: EDB9307A-Z
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With: 598-1133 - KIT DEVELOPMENT EP9307 ARM9
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: No
• Other names: 598-1255

17
17-14
IrDA
EP93xx User’s Guide
17.5.1 Introduction
17.5.1.1 4PPM Modulation
Four position pulse modulation (4PPM) is used for the high-speed transmission rate of
4.0 Mbps. Payload data is divided into data bit pairs (DBPs) for encoding with LSBs
transmitted first. Each DBP is represented by one of four symbols (DDs) comprising a single
125 ms pulse within a 500 ms symbol period. The 125 ms quarters of a symbol are known as
“chips”. The resulting signal waveform for the four data DDs is shown in
Figure 17-3
DBPs.
Note: 1. Bits within each DBP are not reordered, but the least significant DBP is transmitted first.
Note: 2. A “chip” in the context of the FIR is one time slice in the Position Modulation (PPM)
symbol.
and shows modulation of the byte, 10110001b which is constructed using four
Figure 17-2. 4PPM Modulation Encoding
Copyright 2007 Cirrus Logic
Figure 17-2
DS785UM1
and