DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 100
DF2437FV
Manufacturer Part Number
DF2437FV
Description
IC H8S/2437 MCU FLASH 128QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2400r
Specifications of DF2437FV
Core Processor
H8S/2600
Core Size
16-Bit
Speed
20MHz
Connectivity
I²C, SCI
Peripherals
POR, PWM, WDT
Number Of I /o
85
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 16x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
128-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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Part Number:
DF2437FV
Manufacturer:
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4.3.2
If an interrupt is accepted after a reset but before the stack pointer (SP) is initialized, the PC and
CCR will not be saved correctly, leading to a program crash. To prevent this, all interrupt requests,
including NMI, are disabled immediately after a reset. Since the first instruction of a program is
always executed immediately after the reset state ends, make sure that this instruction initializes
the stack pointer (example: MOV.L #xx: 32, SP).
4.3.3
After reset release, the module stop control register (MSTPCR, EXMSTPCR) is initialized and all
modules enter module stop mode.
Consequently, on-chip peripheral module registers cannot be read or written to. Register reading
and writing is enabled when module stop mode is exited.
Rev.2.00 May. 28, 2009 Page 60 of 732
REJ09B0059-0200
(1)(3) Reset exception-handling vector address (when reset, (1)=H'000000, (3)=H'000002)
(2)(4) Start address (contents of reset exception-handling vector address)
(5)
(6)
Interrupts after Reset
On-Chip Peripheral Functions after Reset Release
Internal
address bus
Internal read
signal
Internal write
signal
Internal data
bus
φ
Start address ((5)=(2)(4))
First program instruction
Figure 4.1 Reset Sequence
(1)
Vector fetch
(2)
High
(4)
Internal
processing
(3)
Prefetch of first
program instruction
(5)
(6)
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