AT90CAN64_14 Datasheet, PDF (356/428 Pages) ATMEL Corporation – High-performance, Low-power AVR 8-bit Microcontroller

25.9.2.3
Programming Command Register
The Programming Command Register is a 15-bit register. This register is used to serially shift in
programming commands, and to serially shift out the result of the previous command, if any. The
JTAG Programming Instruction Set is shown in Table 25-16. The state sequence when shifting
in the programming commands is illustrated in Figure 25-12.
Figure 25-11. Programming Command Register
TDI
S
T
R
O
B
E
S
Flash
EEPROM
A
Fuses
D
Lock Bits
D
R
E
S
S
/
D
A
T
A
TDO
Table 25-16. JTAG Programming Instruction
Set a = address high bits, b = address low bits, H = 0 - Low byte, 1 - High Byte, o = data out, i = data in, x = don’t care
Instruction
TDI Sequence⁽¹⁾⁽²⁾
TDO Sequence⁽¹⁾⁽²⁾
Notes
1a. Chip Erase
0100011_10000000
0110001_10000000
0110011_10000000
0110011_10000000
xxxxxxx_xxxxxxxx
xxxxxxx_xxxxxxxx
xxxxxxx_xxxxxxxx
xxxxxxx_xxxxxxxx
1b. Poll for Chip Erase Complete
0110011_10000000
xxxxxox_xxxxxxxx
(4)
2a. Enter Flash Write
0100011_00010000
xxxxxxx_xxxxxxxx
2b. Load Address High Byte
0000111_aaaaaaaa
xxxxxxx_xxxxxxxx
(11)
2c. Load Address Low Byte
0000011_bbbbbbbb
xxxxxxx_xxxxxxxx
2d. Load Data Low Byte
0010011_iiiiiiii
xxxxxxx_xxxxxxxx
2e. Load Data High Byte
0010111_iiiiiiii
xxxxxxx_xxxxxxxx
2f. Latch Data
0110111_00000000
1110111_00000000
0110111_00000000
xxxxxxx_xxxxxxxx
xxxxxxx_xxxxxxxx
(3)
xxxxxxx_xxxxxxxx
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7679H–CAN–08/08