Power supply – Siemens ERTEC200 User Manual

Page 20

Signal description:

IO =

Signal direction from perspective of the application

Input

Output

Bidirectional

Power supply

Pull- = Internal pull-up/pull-down resistor connected to the signal pin

up:

Internal pull-up

dn:

Internal pull-down

PU/PD = External resistances necessary, depending on
application

PU:

External pull-up

PD:

External pull-down

_N in last position of signal name signifies: Signal is Low active Example: INTA_N

Note:
(1) The BOOT[3:0] pins are read into the “BOOT_REG” system configuration register during the active RESET phase.
After a reset, these pins are available as normal function pins.

(2) The CONFIG [6:1] pins are read into the “CONFIG_REG” system configuration register during the active RESET
phase. After a reset, these pins are available as normal function pins.

(3) The TMC1 and TMC2 test pins are shorted to ground during operation. TEST_N and TACT_N can remain open.

(4) The GPIOs[31:0] and LBU pins can contain up to 4 different functions. The IO function pins have a different circuitry,
corresponding to the selected function.

Example of IO Function: B/O/O/I/ (I)

Æ Function 0 = Bidirectional, Function 1 = Output, Function 2 = Output,

Function 3 = Input, (I) = IO Function during RESET = Input

For LBU, PHY-Debug or ETM-Trace-Interface the IO - function is active during Reset, which is selected with the pins
CONFIG[6,5,2]. Default the Function 3 (ETM-Trace, GPIO[44:32]) is set with internal Pullup- and Pulldown-resistors.

Unusual feature:
ETM-outputs are switched to inputs during Reset. They are changed to outputs after the Trace-Modul is switched on with
the debug-module.
Different LBU- and GPIO-Pins have bidirectional functions. The value in the bracket is the default value during Reset, if
they are selected with CONFIG[6,5,2].

Example:
CONFIG[6, 5, 2] = xx0

Æ Function 1 Æ LBU-Mode

All IO-Pins for Function1 are active during Reset
e.g.

LBU_A0 is input

Input during Reset

LBU_D0 is bidirectional

Input during Reset

The alternative GPIO functions are selected by assigning parameters for the GPIO_PORT_MODE_L and
GPIO_PORT_MODE_H registers.
The tabs are described in Section 4.2.2.

The alternative LBU/MII functions are selected with the configuration pins CONFIG[6,5,2] in the user design.

ERTEC 200 Manual

Technical data subject to change Version 1.1.0