© 2014 Microchip Technology Inc. DS50002268A-page 1
PIC32MX270F256D
The PIC32MX270F256D Bluetooth Audio PIM is
designed to demonstrate the capabilities of the
PIC32MX1XX/2XX family of devices using the PIC32
Bluetooth Audio Development Kit board.
The PIC32MX1XX/2XX family of devices are high-
performance 32-bit microcontrollers in low-pin count
packages.
Table 1 shows the mapping between the
development board functions and the device pins.
The MCP23008 (see Figure 3) is an I
2
C bus
expander, which was added to help maintain most of
the functionality of the 100-pin device. The I
2
C
expander controls the on-board LEDs and charge
management logic control lines. For flexibility, the I
2
C
expander has a changeable slave address.
Note: This PIM can only be used with the
PIC32 Bluetooth Audio Development
Board. To get started with development,
please visit: http://www.microchip.com/
pic32tools and click the PIC32 Bluetooth
Audio Development Board product link.
TABLE 1: 44-PIN TO 100-PIN PINOUT
Device
Pin #
PIC32MX270F256D Pin Name PIM Pin #
Functional
Description
I
2
C
Expander
(MCP23008)
1 RPB9/SDA1/CTED4/PMD3/RB9 59, 67 I2C SDA 2
2 RPC6/PMA1/RC6 77 UART1_RX —
3 RPC7/PMA0/RC7 78 UART_TX —
4 RPC8/PMA5/RC8 49 UART2_RX —
5 RPC9/CTED7/PMA6/RC9 41 SW4 —
6V
SS 15, 31, 36, 45, 65, 75 GND 3, 5, 9
7V
CAP 2, 16, 30, 37, 46, 62, 86 3.3V/VCAP —
8 PGED2/RPB10/D+/CTED11/RB10 57 USB D+ —
9 PGEC2/RPB11/D-/RB11 56 USB D- —
10 V
BUS3V3 3.3V 20
11 AN11/RPB13/CTPLS/PMRD/RB13 11 SPI2_SDI —
12 PGED/TMS/PMA10/RA10 27 PGD4 —
13 PGEC/TCK/CTED8/PMA7/RA7 26 PGC4 —
14 CV
REFOUT/AN10/C3INB/RPB14/VBUSON/SCK1/CTED5/RB14 70 I2S1_BCLK —
15 AN9/C3INA/RPB15/SCK2/CTED6/PMCS1/RB15 10 SCK2 —
16 AV
SS 15, 31, 36, 45, 65, 75 GND 3, 5, 9
17 AV
DD 2, 16, 30, 37, 46, 62, 86 3.3V 20
18 MCLR
13 MCLR# —
19 PGED3/V
REF+/CVREF+/AN0/C3INC/RPA0/CTED1/PMD7/RA0 35 VOLUME —
20 PGEC3/V
REF-/CVREF-/AN1/RPA1/CTED2/PMD6/RA1 80 VBUS_SENSE —
21 PGED1/AN2/C1IND/C2INB/C3IND/RPB0/PMD0/RB0 52 SS2 —
22 PGEC1/AN3/C1INC/C2INA/RPB1/CTED12/PMD1/RB1 79 UART1_CTS# —
23 AN4/C1INB/C2IND/RPB2/SDA2/CTED13/PMD2/RB2 17 SW1 —
24 AN5/C1INA/C2INC/RTCC/RPB3/SCL2/PMWR/RB3 38 SW2 —
25 AN6/RPC0/RC0 1 STBY/RS# —
26 AN7/RPC1/RC1 53 I2S1_MCLK —
PIC32MX270F256D Bluetooth
®
Audio 44-pin to 100-pin
TQFP Plug-In Module (PIM) Information Sheet
