Rainbow Electronics ATtiny43U - Manual (Page 143)

143
8048B–AVR–03/09
Figure 19-1. Parallel Programming
Table 19-10. Pin Name Mapping
Signal Name in
Programming Mode
Pin
Name I/O Function
WR PA0 I Write Pulse (Active low).
XA0 PA1 I CLKI Action Bit 0
XA1/BS2 PA2 I
CLKI Action Bit 1. Byte Select 2 (“0” selects low byte, “1”
selects 2’nd high byte).
PAGEL/BS1 PA3 I
Byte Select 1 (“0” selects low byte, “1” selects high byte).
Program Memory and EEPROM Data Page Load.
OE PA5 I Output Enable (Active low).
RDY/BSY PA6 O
0: Device is busy programming, 1: Device is ready for new
command.
DATA I/O PB7-PB0 I/O Bi-directional Data bus (Output when OE is low).
Table 19-11. Pin Values Used to Enter Programming Mode
Pin Symbol Value
PAGEL/BS1 Prog_enable[3] 0
XA1/BS2 Prog_enable[2] 0
XA0 Prog_enable[1] 0
WR Prog_enable[0] 0
VCC
+5V
GND
CLKI/PA6
PA5
PA4
PA0
PA3
PA1
PA2
PB7 - PB0 DATA
RESET/PA7 +12 V
PAGEL/BS1
XA0
XA1/BS2
OE
RDY/BSY
WR