TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 605
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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SPI
20.4.5. SPI Status Register (SPSR)
Rev. 3.1 November 1, 2005
Default:
Default:
Bit(s)
31 : 16
15
14
13 : 11
10 : 8
7
6 : 4
Name:
Name:
R/W:
R/W:
Bit:
Bit:
Mnemonic
⎯
TBSI
RBSI
TBS
RBS
SPOE
⎯
TBSI
31
15
R
1
RBSI
30
14
R
0
29
13
Field Name
Reserved
Transmit Buffer
Status Indicator
Receive Buffer
Status Indicator
Transmit Buffer
Status
Receive Buffer
Status
SPI Overrun Error
Reserved
TBS
000
28
12
R
Figure 20-8 SPI Status Register (SPSR)
27
11
Table 20-8 SPI Status Register (SPSR)
Description
⎯
Transmit Buffer Status Indicator (Default: 1)
Indicates the status of interrupts according to the number of free data in the
Transmitter FIFO.
0: No interrupt
1: Interrupt
Receive Buffer Status Indicator (Default: 0)
Indicates the status of interrupts according to the number of free data in the
Receiver FIFO.
0: No interrupts
1: Interrupts
Transmit Buffer Status (Default: 000)
Indicates how many data are in the Transmit FIFO.
000: No data
001: 1
010: 2
011: 3
100: 4 (FIFO is full)
101 – 111: NA
Receive Buffer Status (Default: 000)
Indicates how many data are in the Receiver FIFO.
000: No data
001: 1
010: 2
011: 3
100: 4 (FIFO is full)
101 – 111: NA
SPI Overrun Error (Default: 0)
Indicates that an overrun occurred in the Transmitter FIFO. You can clear this bit
by writing "1" to it. You can also clear this flag by putting the SPI Module in the
Configuration Mode.
Read:
0: No errors
1: Generate overrun errors
Write:
0: Don’t care
1: Clear
⎯
26
10
RBS
000
25
R
9
20-13
RESERVED
24
8
SPOE
R/C
23
0
7
22
6
RESERVED
21
5
20
Toshiba RISC Processor
4
IFSD SIDLE
19
R
3
0
0xF814
18
R
2
1
STRDY SRRDY
17
R
1
1
TX4939
16
R
0
0
20
20
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