Figure 11. 10-Pin Interface header (J1) Orientation

3.6.4 CryptoCompanion Chip

The AT88Microbase has one CryptoCompanion device (AT88SC108), which is located on the back

side of board. The AT88SC018 is designed as the mate to Atmel’s CryptoRF® (CRF) and

CryptoMemory® (CM) chips. The SCL and SDA pins are connected to PD0 and PD1, respectively.

The RST and PDN pins are connected to PF2 and PF3, respectively.

Figure 12. System CryptoCompanion Schematic

Datasheet can be found on the Atmel web site, http://www.atmel.com/products/securemem.

Note: The CryptoCompanion chip cannot be used with the CryptoAuthentication family of devices.

HWB

RESET

USB

TWI

JTAG

SPI

VCC_D

GND

PB5

PB0

PB7 / PD3

PB2/ PD1

PB4

PB6

PB3 / PD2

PB1/

PD0

AT88SCK109STK3

3-12 AT88CK109STK3 User Guide

8699A—CRYPTO—10/09

The following sections 3.7 – 3.11 describe the AT88CK109BK3 CryptoAuthentication

daughter board.

3.7 AT88CK109BK3 CryptoAuthentication Daughter Board

Figure 13. AT88CK109BK3 Components (top side)

AT88CK109BK3 has two SOT23-3 sockets that support the AT88SA100, AT88SA102, and the

AT88SA10HS 3-leads devices.

Figure 14. Chip-in-Socket Placement (Live bug)

3.8 AT88CK109BK3 HOST and CLIENT Sockets Compatibility

AT88CK109BK3 is supplied with two SOT23-3 sockets titled HOST and CLIENT. Since both

sockets have identical pinout’s, the AT88Microbase can physically accept a host or a client device

in either socket. Therefore, the AT88CK109BK3 can be configured for either a host-client or client-

client development.

SOT23-3

Socket

INTERCONNECT

Header

HOST

PWR LED

CLIENT

PWR LED

10-Pin

Interface Header

Note: When using the demonstration software, the host (AT88SA10HS) and client (AT88SA100 or

AT88SA102) devices must be in their respective sockets according to the “HOST” and “CLIENT”

texts on the board.

3.9 HOST and CLIENT Power Configuration

The AT88CK109BK3 provides the user with the capability to independently power cycle each

socket with software or place the sockets in a constant power-on state, assuming power is applied

to the board.

Figure 15. HOST and CLIENT Power Headers

Figure 16. Schematic Implementation for Software Power Control, HOST-side

Table 1.

HOST and CLIENT sockets Power Configuration

Jumpers Position Comments View

Hardware Power

Configuration

H1, H2, H3 and H4

Mounted

With all 4 jumpers mounted, the HOST and CLIENT

sockets are placed into a constant power–on state.

*Default setting

H2 H1

H4 H3

Part #	PBC02DAAN
Description	CONN HEADER .100 DUAL STR 4POS
Category	CONNECTOR
Availability	Out of Stock
Qty	0

PBC02DAAN

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