HD6473258P10 Renesas Electronics America, HD6473258P10 Datasheet - Page 34

• Manufacturer Part Number: HD6473258P10
• Description: IC H8 MCU OTP 32K 64DIP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/325r

Specifications of HD6473258P10

• Core Processor: H8/300
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: SCI, UART/USART
• Number Of I /o: 53
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 64-DIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Peripherals: -

2.4 Mode and System Control Registers (MDCR and SYSCR)
Two of the control registers in the register field are the mode control register (MDCR) and system
control register (SYSCR). The mode control register controls the MCU mode: the operating mode
of the H8/325 Series chip. The system control register has a bit that enables or disables the on-chip
RAM. Table 2-2 lists the attributes of these registers.
Table 2-2. Mode and System Control Registers
Name
Mode control register
System control register
2.4.1 Mode Control Register (MDCR)—H’FFC5
Bit
Initial value
Read/Write
* Initialized according to MD
Bits 7 to 5 and 2—Reserved: These bits cannot be modified and are always read as 1.
Bits 4 and 3—Reserved: These bits cannot be modified and are always read as 0.
Bits 1 and 0—Mode Select 1 and 0 (MDS1 and MDS0): These bits indicate the values of the
mode pins (MD
not written.
Coding Example: To test whether the MCU is operating in mode 1:
The comparison is with H’E5 instead of H’01 because bits 7, 6, 5, and 2 are always read as 1.
MOV.B @H’FFC5, R0L
CMP.B #H’E5, R0L
1
and MD
—
R
7
1
0
) latched on the rising edge of the RES signal. These bits can be read but
—
R
6
1
1
and MD
Abbreviation
MDCR
SYSCR
—
R
5
1
0
inputs.
24
—
R
4
0
Read/Write
R
R/W
—
R
3
0
—
R
2
1
MDS1
Address
H’FFC5
H’FFC4
R
1
*
MDS0
R
0
*