TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 564

• Manufacturer Part Number: TX4939XBG-400
• Manufacturer: Toshiba

Specifications of TX4939XBG-400

• Cpu Core: TX49/H4 90nm
• Clock Mhz/max Mips: 400/520
• Inst./data Cache: 32KB (4 Way)/32KB (4 Way)
• Tlb: x
• 1cycle Mac: x
• Volts (v): 1.25/2.5/3.3
• Peripherals: DDR, NAND, ATA, ETHERNET, SECURITY, FPU, MMU, SPI, I2S, I2C, PCI, VIDEO, UART, TIMER, RTC
• Companion Chip: TC86C001FG
• Package: PGBA456

EMAC
ARC Data Register (ARC_Data) 0x64
4-Byte data of ARC memory is accessed each time the ARC Data Register is read or written to. In other words, the PCI
Byte Enable signal is ignored. When changing only 2 Bytes of a 4-Byte word, the system software must perform a
Read/Modify/Write.
The ARC Data Register stores copies of data in ARC at the address specified by the ARC Address Register. You can
read the content of the ARC Data Register as many times as you require. Writing data to this register changes the
selected ARC data.
Note:
interpreted in Big Endian.
Rev. 3.1 November 1, 2005
Bits
31 : 24
23 : 16
15 : 8
7 : 0
Default
Default
Name
Name
TYPE
TYPE
In contrast to transmission/reception data in the Master mode, data transferred via the ARC Interface is
Mnemonic
ARC_Data[0]
ARC_Data[1]
ARC_Data[2]
ARC_Data[3]
31
15
30
14
Field Name
ARC Data Register [0]
ARC Data Register [1]
ARC Data Register [2]
ARC Data Register [3]
29
13
ARC_Data[0]
ARC_Data[2]
28
12
R/W
R/W
-
-
27
11
Figure 18-55 ARC Data Register
26
10
Description
ARC_Data[0] (Default -, R/W)
4-Byte data of ARC memory is accessed each time the ARC Data Register is
read or written to.
ARC_Data[1] (Default -, R/W)
4-Byte data of ARC memory is accessed each time the ARC Data Register is
read or written to.
ARC_Data[2] (Default: -, R/W)
4-Byte data of ARC memory is accessed each time the ARC Data Register is
read or written to.
ARC_Data[3] (Default: -, R/W)
4-Byte data of ARC memory is accessed each time the ARC Data Register is
read or written to.
25
9
18-72
24
8
23
7
22
6
21
5
ARC_Data[1]
ARC_Data[3]
20
4
Toshiba RISC Processor
R/W
R/W
-
-
19
3
18
2
17
1
TX4939
16
0
18
18