p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 95

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

3.1
This LSI supports five operating modes (modes 1 to 3, 6, and 7). The operating mode is
determined by the setting of the mode pins (MD2, MD1, and MD0). Table 3.1 shows the MCU
operating mode selection.
Table 3.1
Note:
Mode 1 operates in on-chip ROM disabled extended mode. On-chip emulation is not supported.
Modes 2 and 3 operate in single-chip mode or on-chip ROM enabled extended mode.
Modes 0, 4, and 5 are not available in this LSI. Modes 6 and 7 are operating modes for a special
purpose. Thus, mode pins should be set to enable mode 2 or 3 in the normal program execution
state. Mode pin settings should not be changed during operation.
Mode 4 is a boot mode for programming or erasing the flash memory. For details, see section 19,
Flash Memory (0.18-µm F-ZTAT Version).
Modes 6 and 7 are on-chip emulation modes. In these modes, this LSI is controlled by an on-chip
emulator (E10A) via the H-UDI, thus enabling on-chip emulation. These modes are not supported
in SDIP-64 and QFP-64.
MCU Operating
Mode
1
2
3
6
7
*
Operating Mode Selection
This pin is not supported in SDIP-64 and QFP-64. The input value of MD2 is fixed to 0.
MCU Operating Mode Selection
MD2* MD1 MD0
0
0
0
1
1
Section 3 MCU Operating Modes
0
1
1
1
1
1
1
0
0
1
CPU Operating
Mode
Advanced
Advanced
Normal
Emulation
Emulation
Description
On-chip ROM disabled
extended mode
Single-chip mode,
On-chip ROM enabled
extended mode
Single-chip mode,
On-chip ROM enabled
extended mode
On-chip emulation mode Enabled
On-chip emulation mode Enabled
Rev. 1.00 Sep. 21, 2006 Page 57 of 658
Section 3 MCU Operating Modes
REJ09B0310-0100
On-Chip ROM
Disabled
Enabled
Enabled