TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 408
TX4939XBG-400
Manufacturer Part Number
TX4939XBG-400
Description
Manufacturer
Toshiba
Datasheet
1.TX4939XBG-400.pdf
(740 pages)
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
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PCIC
16.4.22. PCI Bus Arbiter Request Port Register
This register sets the correlation between each PCI Bus request source (PCI Controller and REQ[5:0]) and each Internal
PCI Bus Arbiter Request port (Master A - D, W - Z) (see Figure 16-13).
When changing these settings, each of the eight field values must always be set to different values. After changing this
register, the Broken Master Register (BM) value becomes invalid since the bit mapping changes.
This register is only valid when using the on-chip PCI Bus Arbiter.
Rev. 3.1 November 1, 2005
Default
Default
NAME
NAME
Bit
31
30:28
27
26:24
23
22:20
19
TYPE
TYPE
(PBAREQPORT)
Mnemonic
ReqAP
ReqBP
ReqCP
Rsvd
Rsvd
31
15
30
14
ReqWP
Field Name
Rsvd
Request A Port
Rsvd
Request B Port
Rsvd
Request C Port
Rsvd
ReqAP
R/W
R/W
111
011
29
13
Table 16-34 PCI Bus Arbiter Request Port Register
Figure 16-33 PCI Bus Arbiter Request Port Register
28
12
Rsvd
Rsvd
27
11
Description
Request A Port (Default: 111)
Sets the PCI Bus Master that connects to the Internal PCI Bus Arbiter
Request A Port (Master A).
111: Makes the PCI Controller Master A.
110: Rsvd
101: Makes REQ*[5] Master A.
100: Makes REQ*[4] Master A.
011: Makes REQ*[3] Master A.
010: Makes REQ*[2] Master A.
001: Makes REQ*[1] Master A.
000: Makes REQ*[0] Master A.
Request B Port (Default: 110)
Sets the PCI Bus Master that connects to the Internal PCI Bus Arbiter
Request B Port (Master B).
111: Makes the PCI Controller Master B.
110: Rsvd
101: Makes REQ*[5] Master B
100: Makes REQ*[4] Master B
011: Makes REQ*[3] Master B
010: Makes REQ*[2] Master B.
001: Makes REQ*[1] Master B.
000: Makes REQ*[0] Master B.
Request C Port (Default: 101)
Sets the PCI Bus Master that connects to the Internal PCI Bus Arbiter
Request C Port (Master C).
111: Makes the PCI Controller Master C.
110: Rsvd
101: Makes REQ*[5] Master C
100: Makes REQ*[4] Master C.
011: Makes REQ*[3] Master C.
010: Makes REQ*[2] Master C.
001: Makes REQ*[1] Master C.
000: Makes REQ*[0] Master C.
26
10
ReqBP
ReqXP
R/W
R/W
110
010
25
9
16-44
24
8
Rsvd
Rsvd
23
7
22
6
ReqCP
ReqYP
R/W
R/W
101
001
21
5
20
Toshiba RISC Processor
4
Rsvd
Rsvd
19
3
18
2
ReqDP
ReqZP
R/W
R/W
100
000
17
1
R/W
⎯
R/W
⎯
R/W
⎯
R/W
⎯
TX4939
16
0
16
16
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