TMPR4937XBG-300 Toshiba, TMPR4937XBG-300 Datasheet - Page 146

• Manufacturer Part Number: TMPR4937XBG-300
• Manufacturer: Toshiba

Specifications of TMPR4937XBG-300

• Family Name: TX49
• Device Core Size: 64b
• Frequency (max): 300MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 1.5V
• Operating Supply Voltage (max): 1.6V
• Operating Supply Voltage (min): 1.4V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 484
• Package Type: BGA
• Lead Free Status / Rohs Status: Compliant

OE*/BUSSPRT*
7.5.9
OE*/BUSSPRT*
ADDR[19:0]
DATA[31:0]
SYSCLK
ADDR[19:0]
DATA[31:0]
SWE*
BWE*
ACE*
ACK*
SYSCLK
CE*
BE*
Figure 7.5.23 1-word Single Write (0 Wait, SHWT=0, External ACK*, 32-bit Bus)
Figure 7.5.24 1-word Single Read (0 Wait, SHWT=0, External ACK*, 32-bit Bus)
External ACK Mode Access (32-bit Bus)
SWE*
BWE*
ACE*
ACK*
CE*
BE*
Note 1: The TX4937 sets the ACK* signal to High Impedance in the S1 State.
Note 2: External devices drive the ACK* signal to Low (assert the signal) by the ES1 State.
Note 3: External devices drive the ACK* signal to High (deassert the signal) in the ES2
f
State. If an external device is late in asserting ACK*, then the Wait State is inserted
for the amount of time the external device is late. If a certain condition is met, it is
okay for the ACK* signal to be driven to Low for 1 clock cycle or more. See 7.3.7.4
ACK* Input Timing (External ACK Mode) for more information.
f
f
S1
S1
ES1
ES1
7-46
ES2
ES2
Chapter 7 External Bus Controller
f
0
0
0
ES3
S2
S2
S3
S3
f
f
f