AN2549 datasheet(12/33 Pages) STMICROELECTRONICS

12 / 33 page

AN2549

Modified features

12/33

by the following code for ST10F272Z2:

RTCCON |= 0x0001;// Write 1 into RTCSIR flag to clear it

1.6

CAN modules

The ST10F269Zx has two CAN modules of the B-CAN type.

The ST10F272Z2 has two CAN modules of the C-CAN type. These modules are functionally

compatible with the modules of the ST10F269Zx.

The C-CAN cells provide additional Message Objects and new functionalities. The main

difference is that the Message Objects are no longer directly accessed as memory but are

available through a Message Interface. This changes the programming model of the

modules.

1.6.1

Hardware impact

None.

1.6.2

Software impact

Rewrite the CAN drivers.

1.7

Port input control

In the ST10F269Zx, the Port Input Control register PICON is used to select between TTL

and CMOS-like input thresholds. The CMOS-like input thresholds are defined above the

TTL levels and feature a hysteresis of 250mV to prevent the inputs from toggling while the

respective input signal level is near the thresholds. This feature is available for all pins of

Port 2, Port 3, Port4, Port 7 and Port 8.

In the ST10F272Z2, Port 6 has been added. Moreover, the default hysteresis is now 500mV

for TTL levels and 800mV for CMOS levels.

ST10F269Zx: PICON (F1C4h / E2h)

ESFR

Reset value: --00h

98765

4321

Reserved

LIN

Res.

LIN

HIN

LIN

HIN

LIN

R/W

ST10F272Z2: PICON (F1C4h / E2h)

ESFR

Reset value: 0000h

Reserved

LIN

HIN

LIN

HIN

LIN

R/W

AN2549 Datasheet(PDF) 12 Page - STMicroelectronics

AN2549 Datasheet(HTML) 12 Page - STMicroelectronics

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

Datasheet Download

Link URL