HD64F2145 datasheet(103/829 Pages) RENESAS

103 / 829 page

Rev. 2.0, 08/02, page 63 of 788

Section 3 MCU Operating Modes

3.1

MCU Operating Mode Selection

This LSI has three operating modes (modes 1 to 3). The operating mode is determined by the

setting of the mode pins (MD1 and MD0). Table 3.1 shows the MCU operating mode selection.

Table 3.1 lists the MCU operating modes.

Table 3.1

MCU Operating Mode Selection

MCU

Operating

Mode

MD1

MD0

CPU

Operating

Mode

Description

On-Chip

ROM

—

Normal

Expanded mode with on-chip ROM disabled

Disabled

Advanced

Expanded mode with on-chip ROM enabled

Single-chip mode

Normal

Expanded mode with on-chip ROM enabled

Single-chip mode

Enabled

Mode 1 is an expanded mode that allows access to external memory and peripheral devices. With

modes 2 and 3, operation begins in single-chip mode after reset release, but a transition can be

made to external expansion mode by setting the EXPE bit in MDCR to 1.

Mode 0 cannot be used in this LSI. Thus, mode pins should be set to enable mode 1, 2 or 3 in

normal program execution state. Mode pins should not be changed during operation.

3.2

The following registers are related to the operating mode. For details on the bus control register

(BCR), refer to section 6.3.1, Bus Control Register (BCR).

• Mode control register (MDCR)

• System control register (SYSCR)

• Serial timer control register (STCR)

HD64F2145 Datasheet(PDF) 103 Page - Renesas Technology Corp

HD64F2145 Datasheet(HTML) 103 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL