C8051F827-GS 参数 Datasheet PDF下载

C8051F80x-83x

Table 23.2. Port I/O Assignment for Digital Functions

Digital Function

UART0, SPI0, SMBus,

SYSCLK, PCA0 (CEX0-2

and ECI), T0, or T1.

Any pin used for GPIO

Notes:

Potentially Assignable Port Pins

Any Port pin available for assignment by the

Crossbar. This includes P0.0 - P1.7

2

pins which

have their PnSKIP bit set to 0.

1

P0.0–P2.0

2

SFR(s) used for

Assignment

XBR0, XBR1

PnSKIP

1.

The Crossbar will always assign UART0 pins to P0.4 and P0.5.

2.

Port pins P1.4

–P1.7 are

not available on the 16-pin packages.

23.2.3. Assigning Port I/O Pins to External Digital Event Capture Functions

External digital event capture functions can be used to trigger an interrupt or wake the device from a low

power mode when a transition occurs on a digital I/O pin. The digital event capture functions do not require

dedicated pins and will function on both GPIO pins (PnSKIP = 1) and pins in use by the Crossbar (PnSKIP

= 0). External digital event capture functions cannot be used on pins configured for analog I/O. Table 23.3

shows all available external digital event capture functions.

Table 23.3. Port I/O Assignment for External Digital Event Capture Functions

Digital Function

External Interrupt 0

External Interrupt 1

Port Match

Potentially Assignable Port Pins

P0.0–P0.7

P0.0–P0.7

P0.0–P1.7

*

SFR(s) used for

Assignment

IT01CF

IT01CF

P0MASK, P0MAT

P1MASK, P1MAT

Note:

Port pins P1.4

–P1.7 are

not available on the 16-pin packages.

142

Rev. 1.0