HD64F3437TFI16V Renesas Electronics America, HD64F3437TFI16V Datasheet - Page 89

• Manufacturer Part Number: HD64F3437TFI16V
• Description: MCU FLASH 60K 100-TQFP
• Manufacturer: Renesas Electronics America

Specifications of HD64F3437TFI16V

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.1
3.1.1
The H8/3437 Series operates in three modes numbered 1, 2, and 3. The mode is selected by the
inputs at the mode pins (MD
Table 3.1
Mode
Mode 0
Mode 1
Mode 2
Mode 3
Note: * If the RAME bit in the system control register (SYSCR) is cleared to 0, off-chip memory can
Modes 1 and 2 are expanded modes that permit access to off-chip memory and peripheral devices.
The maximum address space supported by these externally expanded modes is 64 kbytes.
In mode 3 (single-chip mode), only on-chip ROM and RAM and the on-chip register field are
used. All ports are available for general-purpose input and output.
Mode 0 is inoperative in the H8/3437 Series. Avoid setting the mode pins to mode 0, and do not
change the mode pin settings while the chip is operating.
3.1.2
Table 3.2 lists the registers related to the chip’s operating mode: the system control register
(SYSCR) and mode control register (MDCR). The mode control register indicates the inputs to the
mode pins MD
Table 3.2
Name
System control register
Mode control register
Section 3 MCU Operating Modes and Address Space
be accessed instead.
Overview
Mode Selection
Mode and System Control Registers
Operating Modes
Mode and System Control Registers
MD
Low
Low
High
High
1
and MD
1
0
.
MD
Low
High
Low
High
1
and MD
0
Abbreviation
SYSCR
MDCR
0
). See table 3.1.
Address Space
—
Expanded
Expanded
Single-chip
Read/Write
R/W
R
On-Chip ROM
—
Disabled
Enabled
Enabled
Address
H'FFC4
H'FFC5
On-Chip RAM
—
Enabled*
Enabled*
Enabled
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