DF2398F20V Renesas Electronics America, DF2398F20V Datasheet - Page 105

• Manufacturer Part Number: DF2398F20V
• Description: IC H8S/2300 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2398F20V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 87
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• For Use With: YR0K42378FC000BA - KIT EVAL FOR H8S/2378
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

4.2.3
The H8S/2357 Group enters the reset state when the RES pin goes low.
To ensure that the H8S/2357 Group is reset, hold the RES pin low for at least 20 ms at power-up. To reset the H8S/2357
Group during operation, hold the RES pin low for at least 20 states.
When the RES pin goes high after being held low for the necessary time, the H8S/2357 Group starts reset exception
handling as follows:
1. The internal state of the CPU and the registers of the on-chip supporting modules are initialized, the T bit is cleared to
2. The reset exception handling vector address is read and transferred to the PC, and program execution starts from the
Figure 4-2 show examples of the reset sequence.
0 in EXR, and the I bit is set to 1 in EXR and CCR.
address indicated by the PC.
Reset Sequence
RES
Address bus
RD
HWR, LWR
D
(1) (3) Reset exception handling vector address ((1) = H'000000, (3) = H'000002)
(2) (4) Start address (contents of reset exception handling vector address)
(5) Start address ((5) = (2) (4))
(6) First program instruction
Note: * 3 program wait states are inserted.
15
to D
ø
0
Figure 4-2 Reset Sequence (Mode 4)
*
(1)
Vector fetch
(2)
High
*
(3)
Internal
processing
(4)
Prefetch of first
program instruction
Rev.6.00 Oct.28.2004 page 75 of 1016
(5)
*
(6)
REJ09B0138-0600H