MSP430F6779A Datasheet, PDF (70/176 Pages) Texas Instruments – Polyphase Metering SoCs

MSP430F6779A, MSP430F6778A, MSP430F6777A, MSP430F6776A, MSP430F6775A
MSP430F6769A, MSP430F6768A, MSP430F6767A, MSP430F6766A, MSP430F6765A
MSP430F6749A, MSP430F6748A, MSP430F6747A, MSP430F6746A, MSP430F6745A
SLAS982 – MAY 2014
www.ti.com
6.8 Bootstrap Loader (BSL)
The BSL enables users to program the flash memory or RAM using various serial interfaces. Access to
the device memory via the BSL is protected by an user-defined password. BSL entry requires a specific
entry sequence on the RST/NMI/SBWTDIO and TEST/SBWTCK pins. For a complete description of the
features of the BSL and its implementation, see the MSP430 Programming Via the Bootstrap Loader
User's Guide (SLAU319).
Table 6-6. UART BSL Pin Requirements and Functions
DEVICE SIGNAL
RST/NMI/SBWTDIO
TEST/SBWTCK
P2.0
P2.1
VCC
VSS
BSL FUNCTION
Entry sequence signal
Entry sequence signal
Data transmit
Data receive
Power supply
Ground supply
6.9 JTAG Operation
6.9.1 JTAG Standard Interface
The MSP430 family supports the standard JTAG interface which requires four signals for sending and
receiving data. The JTAG signals are shared with general-purpose I/O. The TEST/SBWTCK pin is used to
enable the JTAG signals. In addition to these signals, the RST/NMI/SBWTDIO is required to interface with
MSP430 development tools and device programmers. The JTAG pin requirements are shown in Table 6-
7. For further details on interfacing to development tools and device programmers, see the MSP430
Hardware Tools User's Guide (SLAU278). For a complete description of the features of the JTAG interface
and its implementation, see MSP430 Programming Via the JTAG Interface (SLAU320).
Table 6-7. JTAG Pin Requirements and Functions
DEVICE SIGNAL
PJ.3/TCK
PJ.2/TMS
PJ.1/TDI/TCLK
PJ.0/TDO
TEST/SBWTCK
RST/NMI/SBWTDIO
VCC
VSS
DIRECTION
IN
IN
IN
OUT
IN
IN
FUNCTION
JTAG clock input
JTAG state control
JTAG data input, TCLK input
JTAG data output
Enable JTAG pins
External reset
Power supply
Ground supply
70
Detailed Description
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MSP430F6769A MSP430F6768A MSP430F6767A MSP430F6766A MSP430F6765A MSP430F6749A
MSP430F6748A MSP430F6747A MSP430F6746A MSP430F6745A