MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 391

• Manufacturer Part Number: MOD5234-100IR
• Description: MOD5234 10/100 ETHERNET MODULE
• Manufacturer: NetBurner Inc
• Type: Controllers & Processorsr

Specifications of MOD5234-100IR

• Interface: I²C, SPI, UART
• Voltage - Supply: 2.5V
• Mounting Type: Surface Mount
• Package / Case: Module
• Product: Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Format: -
• Baud Rates: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q4483564

This register is not reset and must be initialized by the user prior to operation.
19.2.4.22 Transmit Buffer Descriptor Ring Start Registers (ETSDR)
The ETSDR is written by the user. It provides a pointer to the start of the circular transmit buffer
descriptor queue in external memory. This pointer must be 32-bit aligned; however, it is
recommended it be made 128-bit aligned (evenly divisible by 16). Bits 1 and 0 should be written
to 0 by the user. Non-zero values in these two bit positions are ignored by the hardware.
This register is not reset and must be initialized by the user prior to operation.
Freescale Semiconductor
Address
Address
Reset
Reset
Reset
Reset
31–2
Bits
1–0
W
W
W
W
R
R
R
R
Figure 19-23. Transmit Buffer Descriptor Ring Start Register (ETDSR)
—
—
—
—
31
15
31
15
Figure 19-22. Receive Descriptor Ring Start Register (ERDSR)
R_DES_
START
Name
—
—
—
—
30
14
30
14
—
—
—
—
—
29
13
29
13
Pointer to start of receive buffer descriptor queue.
Reserved, should be cleared.
Table 19-25. ERDSR Field Descriptions
—
—
—
—
28
12
28
12
—
—
—
—
27
27
11
11
MCF5235 Reference Manual, Rev. 2
—
—
—
—
26
10
26
10
R_DES_START
X_DES_START
25
—
—
25
—
—
9
9
IPSBAR + 0x1180
IPSBAR + 0x1184
R_DES_START
X_DES_START
—
—
—
—
24
24
8
8
Descriptions
23
—
—
23
—
—
7
7
—
—
—
—
22
22
6
6
—
—
—
—
21
21
5
5
—
—
—
—
20
20
4
4
Memory Map/Register Definition
—
—
—
—
19
19
3
3
—
—
—
—
18
18
2
2
—
—
—
—
17
17
0
0
1
1
16
—
—
16
—
—
0
0
0
0
19-27