PC912XDP512F0MPVR datasheet(1019/1348 Pages) FREESCALE

1019 / 1348 page

24.0.5.51 Port J Input Register (PTIJ)

Read: Anytime.

Write: Never, writes to this register have no effect.

This register always reads back the buffered state of the associated pins. This can be used to detect

overload or short circuit conditions on output pins.

24.0.5.52 Port J Data Direction Register (DDRJ)

Read: Anytime.

Write: Anytime.

This register configures each port J pin (except PJ5-2) as either input or output.

The CAN forces the I/O state to be an output on PJ7 (TXCAN4) and an input on pin PJ6

(RXCAN4). The IIC takes control of the I/O if enabled. In these cases the data direction bits will

not change.

The DDRJ bits revert to controlling the I/O direction of a pin when the associated peripheral

module is disabled.

76543210

PTIJ7

PTIJ6

PTIJ1

PTIJ0

Reset1

1. These registers are reset to zero. Two bus clock cycles after reset release the register values are updated with the

associated pin values.

00000000

= Unimplemented or Reserved

Figure 24-53. Port J Input Register (PTIJ)

76543210

DDRJ7

DDRJ6

0000

DDRJ1

DDRJ0

Reset

00000000

= Unimplemented or Reserved

Figure 24-54. Port J Data Direction Register (DDRJ)

Table 24-48. DDRJ Field Descriptions

Field

Description

7–0

DDRJ[7:6]

DDRJ[1:0]

Data Direction Port J

0 Associated pin is conﬁgured as input.

1 Associated pin is conﬁgured as output.

Note: Due to internal synchronization circuits, it can take up to 2 bus clock cycles until the correct value is read

on PTJ or PTIJ registers, when changing the DDRJ register.

PC912XDP512F0MPVR 데이터시트(PDF) 1019 Page - Freescale Semiconductor, Inc

PC912XDP512F0MPVR 데이터시트(HTML) 1019 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

데이터시트 다운로드

링크 URL