Section 3 MCU Operating Modes
Rev. 3.00 Jan 25, 2006 page 55 of 872
REJ09B0286-0300
Section 3 MCU Operating Modes
3.1
Operating Mode Selection
This LSI supports two operating modes (modes 2 and 3). 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
MCU Operating Mode Selection
MCU
Operating
Mode
MD2
MD2
MD2
MD2
MD1 MD0
CPU
Operating
Mode
Description
On-Chip ROM
2
1
1
0
Advanced
mode
Extended mode with on-chip ROM
Single-chip mode
Enabled
3
1
1
1
Normal
mode
Extended mode with on-chip ROM
Single-chip mode
Enabled
Modes 2 and 3 are single-chip mode after a reset. The CPU can switch to extended mode by
setting bit EXPE in MDCR to 1.
Modes 0, 1, and 5 cannot be used in this LSI. Modes 4, 6, and 7 are specific modes. Thus, mode
pins should be set to enable mode 2 or 3 in normal program execution state. Mode pins should not
be changed during operation.
Mode 4 is a boot mode to write/erase the flash memory. For details, see section 24, ROM.
Modes 6 and 7 are on-chip emulation modes. These modes are controlled by the on-chip emulator
(E10A) via the JTAG interface, and on-chip emulation can be performed.
3.2
Register Descriptions
The following registers are related to the operating mode. For details on the bus control register
(BCR), see section 6.3.1, Bus Control Register (BCR), and for details on bus control register 2
(BCR2), see section 6.3.2, Bus Control Register 2 (BCR2).
•
Mode control register (MDCR)
•
System control register (SYSCR)
•
Serial timer control register (STCR)
Summary of Contents for H8S/2158
Page 10: ...Rev 3 00 Jan 25 2006 page viii of lii...
Page 36: ...Rev 3 00 Jan 25 2006 page xxxiv of lii B Product Lineup 863 C Package Dimensions 864 Index 865...
Page 47: ...Rev 3 00 Jan 25 2006 page xlv of lii Appendix Figure C 1 Package Dimensions TBP 112A 864...
Page 54: ...Rev 3 00 Jan 25 2006 page lii of lii...
Page 70: ...Section 1 Overview Rev 3 00 Jan 25 2006 page 16 of 872 REJ09B0286 0300...
Page 118: ...Section 3 MCU Operating Modes Rev 3 00 Jan 25 2006 page 64 of 872 REJ09B0286 0300...
Page 126: ...Section 4 Exception Handling Rev 3 00 Jan 25 2006 page 72 of 872 REJ09B0286 0300...
Page 198: ...Section 6 Bus Controller Rev 3 00 Jan 25 2006 page 144 of 872 REJ09B0286 0300...
Page 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Page 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Page 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Page 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Page 750: ...Section 21 D A Converter Rev 3 00 Jan 25 2006 page 696 of 872 REJ09B0286 0300...
Page 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Page 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
Page 824: ...Section 26 Clock Pulse Generator Rev 3 00 Jan 25 2006 page 770 of 872 REJ09B0286 0300...
Page 844: ...Section 27 Power Down Modes Rev 3 00 Jan 25 2006 page 790 of 872 REJ09B0286 0300...
Page 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Page 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...