HD64F2623FA20J Renesas Electronics America, HD64F2623FA20J Datasheet - Page 207
HD64F2623FA20J
Manufacturer Part Number
HD64F2623FA20J
Description
IC H8S MCU FLASH 256K 100-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2600r
Specifications of HD64F2623FA20J
Core Processor
H8S/2600
Core Size
16-Bit
Speed
20MHz
Connectivity
CAN, SCI, SmartCard
Peripherals
POR, PWM, WDT
Number Of I /o
53
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
12K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 16x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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7.8.5
If MSTPCR is set to H'FFFFFF or H'EFFFFF and a transition is made to sleep mode, the external
bus release function will halt. Therefore, these values should not be set in MSTPCR if the external
bus release function is to be used in sleep mode.
7.9
7.9.1
The H8S/2626 Group and H8S/2623 Group have a bus arbiter that arbitrates bus master
operations.
There are two bus masters, the CPU and DTC, which perform read/write operations when they
have possession of the bus. Each bus master requests the bus by means of a bus request signal. The
bus arbiter determines priorities at the prescribed timing, and permits use of the bus by means of a
bus request acknowledge signal. The selected bus master then takes possession of the bus and
begins its operation.
7.9.2
The bus arbiter detects the bus masters’ bus request signals, and if the bus is requested, sends a bus
request acknowledge signal to the bus master making the request. If there are bus requests from
more than one bus master, the bus request acknowledge signal is sent to the one with the highest
priority. When a bus master receives the bus request acknowledge signal, it takes possession of the
bus until that signal is canceled.
The order of priority of the bus masters is as follows:
An internal bus access by an internal bus master, and external bus release, can be executed in
parallel.
In the event of simultaneous external bus release request, and internal bus master external access
request generation, the order of priority is as follows:
Usage Note
Bus Arbitration
Overview
Operation
(High)
(High) External bus release > Internal bus master external access (Low)
DTC
>
CPU
(Low)
Rev. 5.00 Jan 10, 2006 page 181 of 1042
Section 7 Bus Controller
REJ09B0275-0500
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