Siemens TC65 - Page 75

TC65 Hardware Interface Description
Strictly confidential / Draft
s
TC65_HD_V00.521 Page 75 of 99 24.05.2005
Function Signal name IO Signal form and level Comment
ASC1
Serial
interface
RXD1
TXD1
CTS1
RTS1
O
I
O
I
V
OL
max = 0.2V at I = 2mA
V
OH
min = 2.55V at I = -0.5mA
V
OH
max = 3.05V
V
IL
max = 0.8V
V
IH
min = 2.0V
V
IH
max = VEXTmin + 0.3V = 3.05V
Without Java: 4-wire serial
interface for AT commands or
data stream.
Under Java: Only the RXD1
line of TC65 is used and
serves as System.out.
If lines are unused keep pins
open.
I2CCLK _SPICLK O V
OL
max = 0.2V at I = 2mA
V
OH
min = 2.55V at I = -0.5mA
V
OH
max = 3.05V
I
2
C interface
I2CDAT_SPIDO I/O V
OL
max = 0.2V at I = 2mA
V
IL
max = 0.8V
V
IH
min = 2.0V
V
IH
max = VEXTmin + 0.3V = 3.05V
I
2
C interface is only available
if the two pins are not used as
SPI interface.
I2CDAT is configured as
Open Drain and needs a pull-
up resistor in the host
application.
According to the I
2
C Bus
Specification Version 2.1 for
the fast mode a rise time of
max. 300ns is permitted.
There is also a maximum
V
OL
=0.4V at 3mA specified.
The value of the pull-up
depends on the capacitive
load of the whole system (I2C
Slave + lines). The maximum
sink current of I2CDAT and
I2CCLK is 4mA.
If lines are unused keep pins
open.
SPI
Serial
Peripheral
Interface
SPIDI
I2CDAT_SPIDO
I2CCLK_SPICLK
SPICS
I
O
O
O
V
OL
max = 0.2V at I = 2mA
V
OH
min = 2.55V at I = -0.5mA
V
OH
max = 3.05V
V
IL
max = 0.8V
V
IH
min = 2.0V,
V
IH
max = VEXTmin + 0.3V = 3.05V
If the Serial Peripheral
Interface is active the I
2
C
interface is not available.
If lines are unused keep pins
open.
VUSB_IN I V
IN
min = 4.0V
V
IN
max = 5.25V
USB_DN I/O
USB
USB_DP I/O
Differential Output Crossover voltage
Range
V
CRS
min = 1.5V, V
CRS
max = 2.0V
Driver Output Resistance
Z
DRV
typ = 32Ohm
Without Java: USB port
Under Java: Debug interface
for development purposes.
If lines are unused keep pins
open.
GPIO1 I/O
GPIO2 I/O
GPIO3 I/O
GPIO4 I/O
GPIO5 I/O
GPIO6 I/O
GPIO7 I/O
GPIO8 I/O
GPIO9 I/O
General
Purpose
Input/Output
GPIO10 I/O
V
OL
max = 0.2V at I = 2mA
V
OH
min = 2.55V at I = -0.5mA
V
OH
max = 3.05V
V
IL
max = 0.8V
V
IH
min = 2.0V,
V
IH
max = VEXTmin + 0.3V = 3.05V
All pins which are configured
as input must be connected to
a pull-up or pull-down resistor.
If lines are unused (not
configured) keep pins open.