Intel 8XC196Lx Bedienungsanleitung PDF herunterladen (Seite 116)

8XC196L

SUPPLEMENT

A-8

Table A-5. 87C196LA, LB Default Signal Conditions

Port

Signals

Alternate

Functions

During RESET#

Active

Upon RESET#

Inactive

(Note 6)

Idle

Power-

down

P0.7:2 ACH7:2 HiZ HiZ HiZ HiZ

P1.0 EPA0/T2CLK WK0 WK0 (Note 1) (Note 1)

P1.1 EPA1 WK0 WK0 (Note 1) (Note 1)

P1.2 EPA2/T2DIR WK0 WK0 (Note 1) (Note 1)

P1.3 EPA3 WK0 WK0 (Note 1) (Note 1)

P2.0 TXD WK0 WK0 (Note 1) (Note 1)

P2.1 RXD WK0 WK0 (Note 1) (Note 1)

P2.2 EXTINT WK0 WK0 (Note 1) (Note 1)

P2.4 RXJ1850 (LB only) WK0 WK0 (Note 1) (Note 1)

P2.6 ONCE/TXJ1850 (LB only) MD0 MD0 (Note 1) (Note 1)

P2.7 CLKOUT CLKOUT active,

LoZ0/1

CLKOUT active,

LoZ0/1

(Note 1) (Note 2)

P3.7:0 AD7:0 WK0 HiZ (Note 4) (Note 4)

P4.7:0 AD15:8 WK0 HiZ (Note 4) (Note 4)

P5.0 ALE/ADV# WK0 WK0 (Note 1) (Note 1)

P5.2 WR#/WRL# WK0 WK0 (Note 1) (Note 1)

P5.3 RD# WK0 WK0 (Note 1) (Note 1)

P6.0 EPA8/COMP0 WK0 WK0 (Note 1) (Note 1)

P6.1 EPA9/COMP1 WK0 WK0 (Note 1) (Note 1)

P6.4 SC0 WK0 WK0 (Note 1) (Note 1)

P6.5 SD0 WK0 WK0 (Note 1) (Note 1)

P6.6 SC1 WK0 WK0 (Note 1) (Note 1)

P6.7 SD1 WK0 WK0 (Note 1) (Note 1)

— EA# WK1 (Note 5) WK1 WK1 WK1

— RESET# LoZ0 MD1 MD1 MD1

—V

HiZ HiZ LoZ1 LoZ1

—XTAL1

Osc input, HiZ Osc input, HiZ

Osc input,

HiZ

Osc input,

HiZ

— XTAL2 Osc output,

LoZ0/1

Osc output,

LoZ0/1

Osc output,

LoZ0/1

(Note 3)

NOTES:

1. If P

_MODE.

= 0, port is as programmed.

If P

_MODE.

= 1, pin is as specified by P

_DIR and the associated peripheral.

2. If P2_MODE.7 = 0, pin is as programmed. If P2_MODE.7 = 1, pin is LoZ0.

3. If XTAL1 = 0, pin is LoZ1. If XTAL1 = 1, pin is LoZ0.

4. If EA# = 0, port is HiZ. If EA# = 1, port is open-drain I/O.

5. Although EA# is weakly pulled high, do not allow it to float. Always tie EA# to V

if it is not connected

to an external device.

6. The values in this column are valid until your software writes to P

_MODE.

1 2 ... 111 112 113 114 115 116 117 118 119 120 121 ... 135 136

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