SAM7X256_14 Datasheet, PDF (122/662 Pages) ATMEL Corporation – ARM-based Flash MCU

20.3
Serial Fast Flash Programming
The Serial Fast Flash programming interface is based on IEEE Std. 1149.1 “Standard Test Access Port and Boundary-
Scan Architecture”. Refer to this standard for an explanation of terms used in this chapter and for a description of the
TAP controller states.
In this mode, data read/written from/to the embedded Flash of the device are transmitted through the JTAG interface of
the device.
20.3.1 Device Configuration
In Serial Fast Flash Programming Mode, the device is in a specific test mode.Only a certain set of pins is significant, the
rest of the PIOs are used as inputs with a pull-up. The crystal oscillator is in bypass mode. Other pins must be left
unconnected.
Figure 20-4. Serial Programing
VDDIO
VDDIO
VDDIO
TST
PGMEN0
PGMEN1
TDI
TDO
TMS
TCK
VDDCORE
VDDIO
VDDPLL
VDDFLASH
GND
0-50MHz
XIN
Table 20-18. Signal Description List
Signal Name
VDDFLASH
VDDIO
VDDCORE
VDDPLL
GND
XIN
Function
Type
Power
Flash Power Supply
Power
I/O Lines Power Supply
Power
Core Power Supply
Power
PLL Power Supply
Power
Ground
Ground
Clocks
Main Clock Input.
This input can be tied to GND. In this
case, the device is clocked by the internal
RC oscillator.
Input
Active
Level Comments
32 kHz to 50 MHz
SAM7X Series [DATASHEET]
6120K–ATARM–11-Feb-14
122