IS1678 datasheet(7/54 Pages) MICROCHIP

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Advance Information

DS60001386A-Page 7

IS1678

Table 1-1 provides various pins of the IS1678S/SM.

TABLE 1-1:

PIN DESCRIPTION

Number

Pin Name

Pin Type

Pin Description

No Connection

WAKE_UP

Wake up from Sleep mode (active-low)

(internal pull up)

PMULDO_O

Power

Power management unit output (1.8V), for measurement purpose

only. Do not connect to external devices

Connect to GND through a 1uF (X5R/X7R) capacitor

P0_4

IS1678S/SM State Indicator Pin along with P1_5. Refer Table 2-3

P1_5

IS1678S/SM State indicator Pin along with P0_4. Refer Table 2-3

P1_6/WP

EEPROM WP (Connected to external EEPROM)

P1_2/SCL

I2C SCL to EEPROM

P1_3/SDA

DIO

I2C SDA to EEPROM

1V8

Power

1.8V input for digital core power

Connect to GND through a 1 uF (X5R/X7R) capacitor

VDD_IO

Power

I/O positive supply input (3.3V)

Connect to GND through a 1 uF (X5R/X7R) capacitor

P1_7/UART_CTS

DIO

Configurable Control or Indication pin assigned to UART CTS (input)

P0_5

DIO

Configurable Control or Indication pin

P0_0/UART_RTS

DIO

Configurable Control or Indication pin assigned to UART RTS (out-

put)

P2_0

System configuration pin along with P2_4 and EAN pins. It is used to

set the system in one of the three modes:

• Application mode (for normal operation)

• Test mode (to change EEPROM values)

• Write Flash mode (to enter new firmware into the module).

For detailed information, refer Table 2-1.

P2_4

System configuration pin along with P2_0 and EAN pins. It is used to

set the system in one of the three modes:

• Application mode (for normal operation)

• Test mode (to change EEPROM values)

• Write Flash mode (to enter new firmware into the module).

For detailed information, refer Table 2-1.

EAN

External address-bus negative.

System configuration pin along with P2_0 and P2_4 pins. It is used to

set the system in one of the 3 modes:

• Application mode (for normal operation)

• Test mode (to change EEPROM values)

• Write Flash mode (to enter new firmware into the module).

ROM: Must be pulled high to VDD_IO

FLASH: Must be pulled down with 4.7 Kohm to GND

For detailed information, refer Table 2-1.

RST_N

Module Reset (active-low) (internal pull up)

Apply a pulse of at least 63 ns

Connect to GND through a 1 uF (X5R/X7R) capacitor

HCI_RXD

UART data input

HCI_TXD

UART data output

Legend:

A = Analog

D = Digital

I = Input

O = Output

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