User Manual

10
BPM2001 SMD Module Interface Signal Definitions
Pin# Pin Name Type Description
I/O Voltage Range
01 GND Power System ground
---
02 GND Power System ground
---
03 GND Power System ground
---
04 /PCM_SEL I
High switches SPI/PCM lines
to SPI, low switches SPI/
PCM lines to PCM/PIO use.
Vih: 0.7 X VDD – VDD + 0.4V
Vil: -0.4V -- 0.4 VDD
05 UART_CTS I
UART clear to send, active
low
Vih: 0.7 X VDD – VDD + 0.4V
Vil: -0.4V -- 0.4 VDD
06 POWER_ON I
Take high to enable internal regulators.
Maximum
voltage is VREG_IN_HV.
Note:
USB regulator is always enabled and not
controlled by VREG_EN
Vih: 0.7 X VDD – VDD + 0.4V
Vil: -0.4V -- 0.4 VDD
07 UART_RTS O
UART request to send, active
low
Voh: 0.75 X VDD
Vol: 0 – 0.4V
08 UART_TXD O
UART data output, active
high
Voh: 0.75 X VDD
Vol: 0 – 0.4V
09 UART_RXD I UART data input, active high
Vih: 0.7 X VDD – VDD + 0.4V
Vil: -0.4V -- 0.4 VDD
10 GND Power System ground
---
11 VDD_IN Power 1.8V power output
Input voltage:
2.3V – 4.8V
12 USB_DP I
USB data plus with
selectable internal 1.5kΩ
pull-up resistor
---
13 USB_DN I USB data minus
---
14 GPIO2 I/O
Programmable input/output
line
Voh: 0.75 X VDD
Vol: 0 – 0.4V
Vih: 0.7 X VDD – VDD + 0.4V
Vil: -0.4V -- 0.4 VDD
15 GPIO3 I/O
Programmable input/output
line
Voh: 0.75 X VDD
Vol: 0 – 0.4V
Vih: 0.7 X VDD – VDD + 0.4V
Vil: -0.4V -- 0.4 VDD
16 SPI_CLK/PCM1CLK I
SPI clock/ PCM1 port synchronous
data clock
Vih: 0.7 X VDD – VDD + 0.4V
Vil: -0.4V -- 0.4 VDD
17 GPIO4 I/O
Programmable input/output
line
Voh: 0.75 X VDD
Vol: 0 – 0.4V
Vih: 0.7 X VDD – VDD + 0.4V
Vil: -0.4V -- 0.4 VDD