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MTC20136
Peripherals
UART
Two identical UARTs are implemented in MTC20136. They offer similar functionality to the standard
16C550 device. They can support bit rates of up to 115.2 K bps and contain two 16 byte FIFOs for receive
and transmit.
General purpose I/Os
Four pins are available for general purpose IOs, two are used as inputs to specify the boot configuration
and two are output under SW control. The latter can be used for instance to drive external LEDs.
Reset
The MTC20136 has an asynchronous, active-low reset pin. An external clock is required to leave the reset
state.
Clock
The MTC20136 is operated from the 35.328MHz Master clock, also used by the other DynaMiTe chips.
ELECTRICAL SPECIFICATIONS
Generic
The values presented in the following table apply for all inputs and/or outputs unless specified otherwise.
Specifically they are not influenced by the choice between CMOS or TTL levels.
Table 10. IO buffers generic DC characteristics
Table 11. IO buffers dynamic characteristics
DC Electrical Characteristics
All voltages are referenced to VSS, unless otherwise specified, positive current is towards the device
Symbol
Parameter
Test Conditions
I
IN
Input leakage current
V
IN
=
V
SS
, V
DD
, no
pull up/pull down
I
OZ
Tristate leakage
current
pull up/pull down
I
PU
Pull up current
V
IN
= V
SS
I
PD
Pull down current
V
IN
= V
DD
R
PU
Pull up resistance
V
IN
=
V
SS
R
PD
Pull down resistance
V
IN
= V
DD
Min
-1
Typ
Max
1
Unit
μA
V
IN
=
V
SS
, V
DD
, no
-1
1
μA
-25
-66
-125
μA
25
66
125
μA
50
kOhm
50
kOhm
DC Electrical Characteristics, important for transient but measured at (near) DC
All voltages are referenced to VSS, unless otherwise specified, positive current is towards the device
Symbol
Parameter
Test Conditions
C
IN
Input capacitance
@f = 1MHz
dI/dt
Current derivative
8 mA driver, slew rate control
8 mA driver, no slew rate control
Min
Typ
Max
5
Unit
pF
23.5
89
85
100
mA/ns
mA/ns
mA
mA
pF
I
peak
Peak current
8 mA driver, slew rate control
8 mA driver, no slew rate control
C
OUT
Output capacitance
(also bidirectional and
tristate drivers)
@f = 1MHz
7