TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 726

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TX4939XBG-400

Manufacturer Part Number
TX4939XBG-400
Description
Manufacturer
Toshiba
Datasheet

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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Electrical
28.4.4. External Bus Interface AC Characteristics
Rev. 3.1 November 1, 2005
SYSCLK Cycle Time
SYSCLK High Time
SYSCLK Low Time
SA[5:0] Output Delay
CE[7:0]* Output Delay
OE* Output Delay
SWE* Output Delay
BWE[1:0]* Output Delay
ACE Output Delay
SADB[15:0] Output Delay (H→L, L→H)
SADB[15:0] Output Delay (Hi-Z→Valid)
DATA[15:0] Ouput Delay (Valid→Hi-Z)
SADB[15:0] Input Setup Time
SADB[15:0] Input Hold Time
ACK* Output Delay (H→L, L→H)
ACK* Input Setup Time
ACK* Input Hold Time
Note 1:
OUTPUT
SYSCLK
(Tc = 0 - 85°C, VDD33 = 3.3 V ± 0.2 V, VDD25 = 2.5 V ± 0.2 V, VDDC = 1.25 V ± 0.062 V, VSS = 0 V)
INPUT
When the speed of the Local Bus is set to 1/3,1/4,1/5, 1/6 speed, write data delay has 10 ns more for
synchronization
Item
Figure 28-10 External Bus Interface Timing Diagram
External Bus Interface Timing Diagram
t
SU_**
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
CYC_SYSCLK
HIGH_SYSCLK
LOW_SYSCLK
VAL_ADDR2
VAL_CE
VAL_OE
VAL_SWE
VAL_BWE
VAL_ACE
VAL_BUS
VAL_DATA2ZV
VAL_DATA2VZ
SU_DATA2
HO_DATA2
VAL_ACK
SU_ACK
HO_ACK
inputs valid
Symbol
28-10
t
HO_**
t
VAL_**
Buffer fixed: CL=50 pF, 4 mA
Buffer fixed: CL=50 pF, 4 mA
Buffer fixed: CL=50 pF, 4 mA
For CL=50 pF, 4 mA buffer
Buffer fixed: CL=50 pF, 4 mA
Buffer fixed: CL=50 pF, 4 mA
Buffer fixed: CL=50 pF, 4 mA
Buffer fixed: CL=50 pF, 4 mA
Buffer fixed: CL=50 pF, 4 mA
For CL=50 pF, 4 mA buffer
For CL=50 pF, 4 mA buffer
For CL=50 pF, 4 mA buffer
Buffer fixed: CL=50 pF, 4 mA
t
HIGH_SYSCLK
Condition
t
CYC_SYSCLK
outputs valid
Toshiba RISC Processor
t
LOW_SYSCLK
Min.
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
6.0
0.5
1.5
6.0
0.5
10
-1
4
4
8.5 (1)
Max.
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
TX4939
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
28
28

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