TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 408

• 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

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