UPD70F3737GF-GAS-AX Renesas Electronics America, UPD70F3737GF-GAS-AX Datasheet - Page 199

• Manufacturer Part Number: UPD70F3737GF-GAS-AX
• Description: MCU 32BIT V850ES/JX3-L 100-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3-Lr

Specifications of UPD70F3737GF-GAS-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CSI, EBI/EMI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 84
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

5.6
5.6.1
(1) Data wait control register 0 (DWC0)
Wait Function
To realize interfacing with a low-speed memory or I/O device, up to seven data wait states can be inserted in
the bus cycle that is executed for each memory block space.
The number of wait states can be programmed by using the DWC0 register. Immediately after system reset, 7
data wait states are inserted for all the memory block areas.
The DWC0 register can be read or written in 16-bit units.
Reset sets this register to 7777H.
Cautions 1. The internal ROM and internal RAM areas are not subject to programmable wait, and are
Programmable wait function
DWC0
After reset: 7777H
Memory block n signal
Memory block n signal
2. Write to the DWC0 register after reset, and then do not change the set values. Also, when
always accessed without a wait state. The on-chip peripheral I/O area is also not subject
to programmable wait, and only wait control from each peripheral function is performed.
changing the initial values of the DWC0 register, do not access an external memory area
until the settings are complete.
Caution Be sure to clear bits 15, 11, 7, and 3 to “0”.
DWn2
15
0
7
0
0
0
0
0
1
1
1
1
DWn1
DW32
DW12
14
0
0
1
1
0
0
1
1
6
R/W
CHAPTER 5 BUS CONTROL FUNCTION
Memory block 3
Memory block 1
DW31
DW11
DWn0
User’s Manual U18953EJ5V0UD
Address: FFFFF484H
13
5
0
1
0
1
0
1
0
1
Number of wait states inserted in memory block n space (n = 0 to 3)
None
1
2
3
4
5
6
7
DW30
DW10
12
4
11
0
0
3
DW22
DW02
10
2
Memory block 0
Memory block 2
DW21
DW01
1
9
DW20
DW00
0
8
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