AT90CAN128-16AE ATMEL Corporation, AT90CAN128-16AE Datasheet - Page 327

• Manufacturer Part Number: AT90CAN128-16AE
• Description: 8-bit Avr Microcontroller With 128K Bytes of Isp Flash And CAN Controller.flash (Kbytes) 128 Vcc (V) 2.7-5.5 EEPROM (Kbytes) 4 SRAM (bytes) 4K CAN (mess. Obj.) 15
• Manufacturer: ATMEL Corporation

Parallel Programming
Overview
Signal Names
Pin Mapping
4250C–CAN–03/04
This section describes how to parallel program and verify Flash Program memory,
EEPROM Data memory, Memory Lock bits, and Fuse bits in the AT90CAN128. Pulses
are assumed to be at least 250 ns unless otherwise noted.
In this section, some pins of the AT90CAN128 are referenced by signal names describ-
ing their functionality during parallel programming, see Figure 153 and Table 126. Pins
not described in the following table are referenced by pin names.
The XA1/XA0 pins determine the action executed when the XTAL1 pin is given a posi-
tive pulse. The bit coding is shown in Table 128.
When pulsing WR or OE, the command loaded determines the action executed. The dif-
ferent Commands are shown in Table 129.
Figure 153. Parallel Programming
Table 126. Pin Name Mapping
Programming Mode
Signal Name in
RDY/BSY
PAGEL
DATA
BS1
XA0
XA1
BS2
WR
OE
RDY/BSY
PAGEL
+12 V
Pin Name
BS2
BS1
XA0
XA1
WR
OE
PB7-0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
PA0
I/O
I/O
PD1
PD2
PD3
PD4
PD5
PD6
PD7
RESET
XTAL1
GND
PA0
O
I
I
I
I
I
I
I
Function
0: Device is busy programming,
1: Device is ready for new command.
Output Enable (Active low).
Write Pulse (Active low).
Byte Select 1
(“0” selects low byte, “1” selects high byte).
XTAL Action Bit 0
XTAL Action Bit 1
Program Memory and EEPROM data Page Load.
Byte Select 2
(“0” selects low byte, “1” selects 2’nd high byte).
Bi-directional Data bus (Output when OE is low).
PB7 - PB0
AVCC
VCC
+2.7 - +5.5V
+2.7 - +5.5V
AT90CAN128
DATA
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