M68HC05 datasheet(16/118 Pages) FREESCALE

16 / 118 page

General Description

MC68HC05C9A Advance Information Data Sheet, Rev. 4.1

Freescale Semiconductor

•

The port D data direction register ($0007) is disabled and the seven port D pins become input only.

•

SPI output signals (MOSI, MISO, and SCK) do not require the data direction register control for

output capability.

•

The port D wire-OR mode control bit (bit 5 of SPCR $000A) is disabled, preventing open-drain

configuration of port D.

•

The RESET pin becomes input only.

1.4 Mask Options

The following two mask option registers are used to select features controlled by mask changes on the

MC68HC05C9A and the MC68HC05C12A:

•

Port B mask option register (PBMOR)

•

C12 mask option register (C12MOR)

The mask option registers are EPROM locations which must be programmed prior to operation of the

microcontroller.

1.4.1 Port B Mask Option Register (PBMOR)

The PBMOR register, shown in Figure 1-2, contains eight programmable bits which determine whether

each port B bit (when in input mode) has the pullup and interrupt enabled. The port B interrupts share the

vector and edge/edge-level sensitivity with the IRQ pin. For more details, (see 4.3 External Interrupt (IRQ

or Port B)).

PBPU7–PBPU0 — Port B Pullup/Interrupt Enable Bits

1 = Pullup and CPU interrupt enabled

0 = Pullup and CPU interrupt disabled

NOTE

The current capability of the port B pullup devices is equivalent to the

MC68HC05C9A, which is less than the MC68HC05C12A.

1.4.2 C12 Mask Option Register (C12MOR)

The C12MOR register, shown in Figure 1-3, controls the following options:

•

Select between MC68HC05C9A/C12A configuration

•

Enable/disable stop mode (C12A mode only)

•

Enable/disable COP (C12A mode only)

•

Edge-triggered only or edge- and level-triggered external interrupt pin (IRQ pin) (C12A mode only).

$3FF0

Bit 7

654321

Bit 0

PBPU7

PBPU6

PBPU5

PBPU4

PBPU3

PBPU2

PBPU1

PBPU0

Figure 1-2. Port B Mask Option Register

M68HC05 bảng dữ liệu(PDF) 16 Page - Freescale Semiconductor, Inc

M68HC05 bảng dữ liệu(HTML) 16 Page - Freescale Semiconductor, Inc

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

bảng dữ liệu tải về

Link URL