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8 Hardware Description
8.1 Overview
Figure 8-1
is the high-level block diagram of the CC2564MODNEM board. The oscillator is the default clock with
a frequency accuracy of 32.768 kHz + –250 ppm. The signals from the dual-mode Bluetooth CC2564 module
include UART, PCM, nSHUTD, and slow clock. The CC2564MODNEM board has the following connectors:
•
EM (default)
•
COM
The connectors can supply power to the CC2564MODN through either VBAT_EDGE or VBAT_MCU. For the EM
connector, the signals are controlled through level shifters. The hardware can be configured and modified to use
the slow clock from the connectors. The third connector, the debug header, can be used for testing. The I/Os of
the EM connector are at 3.3 V. The I/Os of the COM connector are at 1.8 V and require hardware modification.
The I/Os for the debug header connector are at 1.8 V and require hardware modification.
VBAT_MCU
EM
Connector
VBAT_EDGE
8.2 Connectors
8.2.1 The EM Connector
The EM connectors can mount a variety of TI MCU platforms such as the MSP430 (MSP-EXP430F5529 and
MSP-EXP430F5438) and TM4C (DK-TM4C123G and DK-TM4C129X). The EM I/Os are at 3.3 V. The pin
assignments are for the CC2564MODN side. For example, MODULE_UART_RX refers to the receiving UART
RX pin on the CC2564MODN that connects to the UART TX pin on the MCU.
connector on the board.
Table 8-1
Pin Number
1
3
5
7
9
SWRU390A – AUGUST 2014 – REVISED AUGUST 2021
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UART
PCM
Level
Shifters
nSHUTD
Slow Clock
COM
Connector
Debug
Header
Oscillator
32.768-kHz
Figure 8-1. CC2564MODNEM Block Diagram
shows the standard pinout.
Table 8-1. EM1 Connector Standard Pinout
EM Adaptor Assignment
GND
MODULE_UART_CTS
SLOW_CLK
MODULE_UART_RX
MODULE_UART_TX
Copyright © 2021 Texas Instruments Incorporated
VBAT
UART
PCM
CC2564MODN
nSHUTD
Slow Clock
Slow Clock
Figure 7-2
Pin Number
2
4
6
8
10
Dual-Mode Bluetooth
Hardware Description
LDO
VDD_IO
Antenna
U.FL
shows the EM
EM Adaptor Assignment
N/C
N/C
N/C
N/C
N/C
®
CC2564 Module Evaluation Board
9
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