M30840SGP#U5 Renesas Electronics America, M30840SGP#U5 Datasheet - Page 100

• Manufacturer Part Number: M30840SGP#U5
• Description: IC M32C/84 MCU ROMLESS 100LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M32C/80r

Specifications of M30840SGP#U5

• Core Processor: M32C/80
• Core Size: 16/32-Bit
• Speed: 32MHz
• Connectivity: CAN, I²C, IEBus, SIO, UART/USART
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 45
• Program Memory Type: ROMless
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 10x10b, D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 100-LQFP
• For Use With: R0K330879S001BE - KIT DEV RSK M32C/87R0K330879S000BE - KIT DEV RSK M32C/87
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

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8.3 Page Mode Control Function
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The page mode control functin allows the microcimputer to be read data in the external memory, associ-
ated with page mode, at high speeds. If the 21 high-order bits of consecutive addresses accessed by the
microcomputer remains the same, access time to each address following the first access is shortened.
The EWCRi (i=0 to 3) registers determine how many wait states are inserted to access the first address.
The PWCR0 and PWCR1 registers determine how many wait states are inserted to access the consecu-
tive addresses following the first address.
Use the following procedure to enable the page mode control.
When using the page mode control, access data in all external space only with the page mode control.
It is not allowed to combine the page mode control access and normal access to data in each external
space.
Set the PM05 and PM04 bits in the PM0 register to "00
control function and multiplexed bus cannot be used at the same time.
Figure 8.13 shows the PWCR0 register. Figure 8.14 shows the PWCR1 register. Figure 8.15 shows an
example of the external bus operation with the page mode control function.
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The page mode control function can be used in the ROMless version only.
(1) Set the EWCRi04 to EWCRi00 (i=0 to 3) bits in the EWCRi register
(2) Set the PWCRj02 to PWCRj00 (j=0, 1) bits and the PWCRj06 to PWCRj04 bits in the PWCRj register
(3) Set the PWCRj03 and PWCRj07 bits in the PWCRj register to "1" (page mode control enabled)
NOTE
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" (multiplexed bus not used). The page mode
8. Bus