HD64F3026X25 Renesas Electronics America, HD64F3026X25 Datasheet - Page 513

• Manufacturer Part Number: HD64F3026X25
• Description: MCU 3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3026X25

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 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: -

16.2
One function of SYSCR is to enable or disable access to the on-chip RAM. The on-chip RAM is
enabled or disabled by the RAME bit in SYSCR. For details about the other bits, see section 3.3,
System Control Register (SYSCR).
Bit 0—RAM Enable (RAME): Enables or disables the on-chip RAM. The RAME bit is
initialized at the rising edge of the input at the
mode.
Bit 0
RAME
0
1
Bit
Initial value
Read/Write
System Control Register (SYSCR)
Description
On-chip RAM is disabled
On-chip RAM is enabled
Software standby
SSBY
R/W
7
0
STS2
R/W
6
0
Standby timer select 2 to 0
STS1
R/W
5
0
R E S
STS0
R/W
4
0
pin. It is not initialized in software standby
User bit enable
Rev. 2.00 Sep 20, 2005 page 473 of 800
R/W
UE
3
1
NMI edge select
NMIEG
R/W
2
0
Software standby
output port enable
SSOE
R/W
REJ09B0260-0200
1
0
Section 16 RAM
RAM enable bit
Enables or
disables
on-chip RAM
(Initial value)
RAME
R/W
0
1