D12312SVTE25 Renesas Electronics America, D12312SVTE25 Datasheet - Page 204
D12312SVTE25
Manufacturer Part Number
D12312SVTE25
Description
MCU 3V 0K 100-TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2300r
Datasheet
1.D12312SVTE25V.pdf
(1146 pages)
Specifications of D12312SVTE25
Core Processor
H8S/2000
Core Size
16-Bit
Speed
25MHz
Connectivity
SCI, SmartCard
Peripherals
POR, PWM, WDT
Number Of I /o
70
Program Memory Type
ROMless
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Program Memory Size
-
Other names
HD6412312SVTE25
HD6412312SVTE25
HD6412312SVTE25
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
D12312SVTE25V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 204 of 1146
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Section 6 Bus Controller
6.5
6.5.1
With the chip, external space area 0 can be designated as burst ROM space, and burst ROM
interfacing can be performed. The burst ROM space interface enables 16-bit configuration ROM
with burst access capability to be accessed at high speed.
Area 0 can be designated as burst ROM space by means of the BRSTRM bit in BCRH.
Consecutive burst accesses of a maximum of 4 words or 8 words can be performed for CPU
instruction fetches only. One or two states can be selected for burst access.
6.5.2
The number of states in the initial cycle (full access) of the burst ROM interface is in accordance
with the setting of the AST0 bit in ASTCR. Also, when the AST0 bit is set to 1, wait state
insertion is possible. One or two states can be selected for the burst cycle, according to the setting
of the BRSTS1 bit in BCRH. Wait states cannot be inserted. When area 0 is designated as burst
ROM space, it becomes 16-bit access space regardless of the setting of the ABW0 bit in ABWCR.
When the BRSTS0 bit in BCRH is cleared to 0, burst access of up to 4 words is performed; when
the BRSTS0 bit is set to 1, burst access of up to 8 words is performed.
The basic access timing for burst ROM space is shown in figures 6.15 (a) and (b). The timing
shown in figure 6.15 (a) is for the case where the AST0 and BRSTS1 bits are both set to 1, and
that in figure 6.15 (b) is for the case where both these bits are cleared to 0.
Rev.7.00 Feb. 14, 2007 page 170 of 1108
REJ09B0089-0700
Burst ROM Interface
Overview
Basic Timing
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