Hardware Manual

41 / 48
TESSERA TECHNOLOGY INC.
5. Description of each part
5.1. LED
Reference
name
connection
explanation
LED1
CPU_VIN
Lights up when the MCU is supplied with an internal voltage.
LED2
MCU P506
General purpose LED. Low output from P506 lights up.
LED3
FT232RL Tx
Flashes when the USBconnector (CN4) communicates to USB-
Serial.
LED4
FT232RL Rx
5.2. Switch
5.2.1. Mode setting switch
Reference
name
connection
explanation
SW3
MD/P201
Toggle Single Chip Mode / SCI boot mode.
SW4
EHMD
Switch between Normal Mode / EHC Mode.
5.2.2. Momentary Switch
Reference
name
connection
explanation
SW1
RES #
MCU reset.
SW2
P505/IRQ1_C
General purpose push switch. Connect to GND when pressed.
SW5
(MCU_VCC)
MCU_VCC discharges the battery.
SW6
(VCC_SU)
VCC_SU discharges the battery.
5.3. External clock description
Reference
name
connection
explanation
XTAL1
Main Clock Oscillator(MOSC)
32MHz Crystal Resynthes
XTAL2
Subclock oscillator(SOSC)
32.768kHz Crystal Resynthes
XTAL3
Bluetooth Oscillator (BLELK)
32MHz Crystal Resynthes
The subclock oscillator drive capability (SODRV, SODRV0) should be set to "low CL4" as
follows.
SODRV = 1、 SODRV0 = 0