MEC1632 datasheet(21/636 Pages) MICROCHIP

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DS00001592B-page 21

MEC1632

Note 3-3

For ribbon cable applications, the Low Speed BC-Link Master maximum clock frequency is 3

MHz. The High Speed BC-Link Master maximum clock frequency is 20.27 MHz. The clock

frequency is set with the BC Clock Select. register.

Note 3-4

the BCM DAT pins require a weak pull up resistor (100 K Ohms).

3.5.4

JTAG INTERFACE

TABLE 3-9:

JTAG INTERFACE

3.5.5

MASTER CLOCK INTERFACE

TABLE 3-10:

MASTER CLOCK INTERFACE

JTAG Interface

(5 Pins)

Pin Ref. Number

Signal Name

Description

Notes

131

JTAG_CLK

JTAG Test Clock

133

JTAG_RST#

JTAG Test Reset (active low)

Note 14

129

JTAG_TDI

JTAG Test Data In

130

JTAG_TDO

JTAG Test Data Out

132

JTAG_TMS

JTAG Test Mode Select

Master Clock Interface

(4 Pins)

Pin Ref. Number

Signal Name

Description

Notes

32KHZ_IN

32.768 KHz Digital Input

165

32KHZ_OUT

32.768 KHz Digital Output

167

XTAL1

32.768 KHz Crystal Input

168

XTAL2

32.768 KHz Crystal Output (single-ended

32.768 kHz clock input)

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