EP9301-CQ Cirrus Logic Inc, EP9301-CQ Datasheet - Page 338

• Manufacturer Part Number: EP9301-CQ
• Description: IC ARM920T MCU 166MHZ 208-LQFP
• Manufacturer: Cirrus Logic Inc
• Series: EP9r

Specifications of EP9301-CQ

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 166MHz
• Connectivity: EBI/EMI, Ethernet, I²C, IrDA, SPI, UART/USART, USB
• Peripherals: AC'97, DMA, I&sup2:S, LED, MaverickKey, POR, PWM, WDT
• Number Of I /o: 19
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 3.6 V
• Data Converters: A/D 5x12b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 208-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Other names: 598-1248

9
9-36
1/10/100 Mbps Ethernet LAN Controller
EP93xx User’s Guide
9.2.3.14 Transmit Descriptor Data/Status Flow
descriptor count
descriptor count
descriptor count
Tx Descriptor
Write TxDEQ
Write TxDEQ
Write TxDEQ
and Status
with valid
with valid
with valid
Initialize
Queues
SoftWare
Reset
Random timing between
Write TxEnq steps
Figure 9-17. Transmit Descriptor Data/Status Flow
Processor + LAN
[CS8950 + LAN]
Copyright 2007 Cirrus Logic
Descriptors
Descriptors
Descriptors
HardWare
Read Tx
Read Tx
Read Tx
Read Tx
Read Tx
Read Tx
Read Tx
Idle
Data
Data
Data
Data
Send Frame 1
Send Frame 0
Send Frame 2
Tx Status
Tx Status
Tx Status
Write
Write
Write
SoftWare
Tx Status
Tx Status
Tx Status
Process
Process
Process
DS785UM1