TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 623
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
Available stocks
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Quantity
Price
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Manufacturer:
NSC
Quantity:
872
Company:
Part Number:
TX4939XBG-400
Manufacturer:
TOSHIBA
Quantity:
10 440
Part Number:
TX4939XBG-400
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Quantity:
20 000
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I2C
22.9. Programming Examples
22.9.1. Example 1 (Byte Mode)
Write 1 byte of data to a slave.
Slave address = 0x51 (b”1010001”)
Data to write = 0xAC
I2C Sequence:
Commands:
Rev. 3.1 November 1, 2005
SCL
SDA
(1)
(2)
(3)
(4)
(5)
(6)
(1)
(2)
(3)
generate start command
write slave address + write bit
receive acknowledge from slave
write data
receive acknowledge from slave
generate stop command
write 0xA2 (address + write bit) to Transmit Register, set STA bit, set WR bit.
read I2C_ASTS (ACK) bit from Control/Status Register, should be ‘0’.
write 0xAC to Transmit register, set STO bit, set WR bit.
read I2C_DSTS (ACK) bit from Status Register, should be ‘0’.
S
-- wait for interrupt or I2C_DSTS flag to negate –
-- wait for interrupt or I2C_DSTS flag to negate –
First Command
Figure 22-7 Byte Mode
Wr ack
22-13
Second Command
Toshiba RISC Processor
ack
P
TX4939
22
22
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