UPD70F3451GC-UBT-A Renesas Electronics America, UPD70F3451GC-UBT-A Datasheet - Page 946

• Manufacturer Part Number: UPD70F3451GC-UBT-A
• Description: MCU 32BIT 128KB FLASH 80LQFP
• Manufacturer: Renesas Electronics America
• Series: V850E/Ix3r

Specifications of UPD70F3451GC-UBT-A

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 64MHz
• Connectivity: CSI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 44
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3.5 V ~ 5.5 V
• Data Converters: A/D 10x12b, 4x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

<R>
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18.6.2 External wait function
inserted in the bus cycle by the external wait pin (WAIT) for synchronization with the external device.
be controlled by external waits.
18.6.3 Relationship between programmable wait and external wait
programmable wait and the wait cycle controlled by the WAIT pin.
states will be inserted in the bus cycle. Wait states inserted via the WAIT pin may be slower than the expected timing.
In this case, use programmable waits to adjust the timing.
944
When a low-speed device or asynchronous system is connected, an arbitrary number of wait states can be
Just as with programmable waits, accessing internal ROM, internal RAM, and on-chip peripheral I/O areas cannot
The external WAIT signal can be input asynchronously to the external bus clock frequency.
A wait cycle is inserted as the result of an OR operation between the wait cycle specified by the set value of the
For example, if the timings of the programmable wait and the WAIT pin signal are as illustrated below, three wait
Remark
Programmable wait
Wait via WAIT pin
The circle
Wait control
WAIT pin
CLKOUT
Programmable wait
indicates the sampling timing.
Wait by WAIT pin
Figure 18-1. Example of Inserting Wait States (1/2)
CHAPTER 18 BUS CONTROL FUNCTION
T1
(a) In separate bus mode
User’s Manual U18279EJ3V0UD
T2
TW
TW
Wait control
TW