User Manual

CONFIDENTIAL
© 2000~2011 iSSC Technologies Corp.
15
15 I/O USB_DP Reserved
16 I/O USB_DM Reserved
17 I P20
System configuration, refer to P2_4, No drive under APP Mode
18 I P24
Boot mode selection (No drive under APP Mode)
P2_0/ P2_4: HH Æ Application
LL Æ Boot mode
LH Æ HCI UART mode for testing and system configuration.
19 O
P21
CP_RST:
Reset Authentication Coprocessor 2.0B
20 O
P22
STATUS_IND:
Bluetooth link status indication,
P22/P04: HH Æ Power default value and Shutdown State.
P22/P04: HL Æ Access State.
P22/P04: LL Æ Link State w/o UART_TXD.
P22/P04: LH Æ Link State with UART_TXD.
21 I EAN
ROM/ Flash selection. (No drive under APP Mode)
H: ROM code; L: Flash code
22 I
RST_N External reset input (Low Active), clock period 62.5n at least.
23 I HCI_RXD UART_RXD
24 O HCI_TXD UART_TXD
25 I
P26
UART_CTS:
UART Flow Control- set HIGH to disable TX transmitter.
26 O
P27
UART_RTS:
UART Flow Control- go HIGH to disable host transmitter.
Open data session indication- go LOW when APP session is ready.
27 I
P23
LINK_DROP:
Host_MCU ask to drop SPP link under Link State;
One low pulse with 10 ms duration low signal to trigger SPP disconnection.
Otherwise it will be set as high always.
28 I
P25
Pairing Key:
Device will enter Standby Mode after pull low over 240ms.
29 I
P07
UART_RX_IND:
L: Inform BM57 that UART data will be transmitted out after 1 ms
H: Otherwise.
30 O
LED1 LED1 driver
31 P GND Ground
32 RI/O BT_RF RF Port