DF3048X16V Renesas Electronics America, DF3048X16V Datasheet - Page 655
![MCU 5V 128K,PB-FREE 100-TQFP](/photos/28/61/286123/100-tqfp__100-vqfp_sml.jpg)
DF3048X16V
Manufacturer Part Number
DF3048X16V
Description
MCU 5V 128K,PB-FREE 100-TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Hr
Specifications of DF3048X16V
Core Processor
H8/300H
Core Size
16-Bit
Speed
16MHz
Connectivity
SCI, SmartCard
Peripherals
DMA, PWM, WDT
Number Of I /o
70
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
4K 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
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF3048X16V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 655 of 907
- Download datasheet (6Mb)
19.6
Erasing and programming flash memory takes time, which can make it difficult to tune parameters
and other data in real time. If necessary, real-time updates of flash memory can be emulated by
overlapping the small-block flash-memory area with part of the RAM (H'FFF000 to H'FFF1FF).
This RAM reassignment is performed using bits 3 to 0 of the RAM control register (RAMCR).
After a flash memory area has been overlapped by RAM, it can be accessed from two address
areas: the overlapped flash memory area, and the original RAM area (H'FFF000 to H'FFF1FF).
Table 19.11 indicates how to reassign RAM.
RAM Control Register (RAMCR)
Note: * Bit 7 and bits 3 to 0 are initialized by a reset and in hardware standby mode. They are not
Table 19.11 RAM Area Reassignment
RAM Area
H'FFF000 to H'FFF1FF
H'01F000 to H'01F1FF
H'01F200 to H'01F3FF
H'01F400 to H'01F5FF
H'01F600 to H'01F7FF
H'01F800 to H'01F9FF
H'01FA00 to H'01FBFF
H'01FC00 to H'01FDFF
H'01FE00 to H'01FFFF
Bit
Initial value*
Read/Write
initialized in software standby mode. Bits 3 to 0 can be written to in modes 5, 6, and 7 (on-
chip flash memory enabled). In other modes, they are always read as 0 and cannot be
modified.
Flash Memory Emulation by RAM
FLER
R
7
0
Section 19 Flash Memory (H8/3048F: Dual Power Supply (V
—
—
6
1
Bit 3
RAMS
0
1
1
1
1
1
1
1
1
—
—
5
1
Bit 2
RAM2
0/1
0
0
0
0
1
1
1
1
—
—
4
1
Rev. 7.00 Sep 21, 2005 page 629 of 878
RAMS
R/W
3
0
Bit 1
RAM1
0/1
0
0
1
1
0
0
1
1
RAM2
R/W
2
0
REJ09B0259-0700
RAM1
R/W
1
0
Bit 0
RAM0
0/1
0
1
0
1
0
1
0
1
PP
RAM0
= 12 V))
R/W
0
0
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