Data Sheet
EnzyTek Technology, Inc. 
7F, No. 35, Hsueh Fu Rd., Hsinchu 300, 
Taiwan , R.O.C. 
TEL:886-3-573-6708    FAX:  886-3-573-8749 
7/24 
I/O PIN LISTING 
Pin No. 
Pin Name 
Type 
Description 
1 
VDD_PADS 
Power 
1.8 V/3.3 V PIO supply 
2 
VCHG 
Power 
VCHG voltage input. 
3 
LED0 
Analog or digital input/ 
open drain output. 
General-purpose analog/digital input or open drain 
LED output. 
4 
LED1 
Analog or digital input/ 
open drain output. 
General-purpose analog/digital input or open drain 
LED output. 
5 
PIO19 
Digital:  Bidirectional  with  programmable 
strength internal pull- up/pull-down 
Programmable I/O line 19. 
Alternative function:  ■  PCM_DIN[0] 
6 
PIO18 
Digital: Bidirectional with programmable 
strength internal pull- up/pull-down 
Programmable I/O line 18. 
Alternative function:  ■  PCM_DOUT[0] 
7 
PIO17 
Digital:  Bidirectional  with  programmable 
strength internal pull- up/pull-down 
Programmable I/O line 17. 
Alternative function:  ■  PCM_SYNC 
8 
PIO16 
Digital:  Bidirectional  with  programmable 
strength internal pull- up/pull-down 
Programmable I/O line 16. 
Alternative function:  ■  PCM_CLK 
9 
PIO15 
Digital:  Bidirectional  with  programmable 
strength internal pull- up/pull-down 
Programmable I/O line 15. 
Alternative function:  ■  MCLK_OUT 
10 
USB_DP 
Digital 
USB Full Speed device D- I/O. 
IEC-61000-4-2 (device level) ESD Protection 
11 
USB_DN 
Digital 
USB Full Speed device D+ I/O. IEC-61000-4-2 
(device level) ESD Protection 
12 
VCC 
Power 
DC 3.3V input. 
13 
GND 
Power 
Ground 
14 
PIO2 
Digital:  Bidirectional  with  programmable 
strength internal pull- up/pull-down 
Programmable I/O line 2. 
Alternative function:  ■  TBR_MISO[3] 
15 
PIO3 
Digital:  Bidirectional  with  programmable 
strength internal pull- up/pull-down 
Programmable I/O line 3. 
Alternative function:  ■  TBR_MISO[2] 
16 
PIO4 
Digital:  Bidirectional  with  programmable 
strength internal pull- up/pull-down 
Programmable I/O line 4. 
Alternative function:  ■  TBR_MOSI[1] 
17 
PIO5 
Digital:  Bidirectional  with  programmable 
strength internal pull- up/pull-down 
Programmable I/O line 5. 
Alternative function:  ■  TBR_MISO[1] 










