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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

Min

Typ

Max

Unit

Input leakage current

pull up/pull down

-1

1

µA

Tristate leakage

current

pull up/pull down

-1

1

µA

Pull up current

-25

-66

-125

µA

Pull down current

25

66

125

µA

Pull up resistance

50

kOhm

Pull down resistance

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

Min

Typ

Max

Unit

Input capacitance

@f = 1MHz

5

pF

dI/dt

Current derivative

8 mA driver, slew rate control

8 mA driver, no slew rate control

23.5

mA/ns

89

mA/ns

Peak current

8 mA driver, slew rate control

8 mA driver, no slew rate control

85

mA

100

mA

Output capacitance

(also bidirectional and

tristate drivers)

@f = 1MHz

7

pF