t6020m ATMEL Corporation, t6020m Datasheet - Page 20

• Manufacturer Part Number: t6020m
• Description: Low-current Microcontroller For Watchdog Function
• Manufacturer: ATMEL Corporation

Table 6 Peripheral addresses
3.2
All ports (2, 4 and 5) are 4 bits wide. All ports may be used
for data input or output. All ports are equipped with
Schmitt trigger inputs and a variety of mask options for
open drain, open source, full complementary outputs, pull
up and pull down transistors. All Port Data Registers
(PxDAT) are I/O mapped to the primary address register
of the respective port address and the Port Control Regis-
ter (PxCR), to the corresponding auxiliary register.
T6020M
20 (54)
A
D
Port Address
B
C
E
F
1
2
3
4
5
6
7
8
9
Aux.
Aux.
Aux.
Aux.
Aux.
Aux.
Bidirectional Ports
B-F
Subport address
A
0
1
2
3
4
5
6
7
8
9
––––
P2DAT
P2CR
SC
CWD
CM
P4DAT
P4CR
P5DAT
P5CR
––––
T12SUB
T2C
T2M1
T2M2
T2CM
T2CO1
T2CO2
––––
––––
T1C1
T1C2
WDC
ASW
STB
SRB
SIC1
SISC
SIC2
––––
––––
RBR
–––
VMC
VMST
Name
/Read
Write
––––
––––
W/R
W/R
W/R
W/R
W/R
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
R
R
R
xxxx xxxxb
xxxx xxxxb
Reset Value
1111 1111b
1111 1111b
1111 1111b
1x11b
xxxxb
0000b
0000b
1x11b
0000b
xx11b
1111b
1111b
1111b
1111b
1111b
1111b
1111b
1111b
1111b
x111b
1111b
1111b
1111b
1111b
1111b
––––
––––
––––
––––
Reserved
Port 2 – data register / pin data
Port 2 – control register
Port 3 – system configuration register
Watchdog reset
Port 3 – clock management register
Port 4 – data register / pin data
Port 4 – control register (byte)
Port 5 – data register / pin data
Port 5 – control register (byte)
Reserved
Data to Timer 1/2 subport
Timer 2 control register
Timer 2 mode register 1
Timer 2 mode register 2
Timer 2 compare mode register
Timer 2 compare register 1
Timer 2 compare register 2 (byte)
Reserved
Reserved
Timer 1 control register 1
Timer 1 control register 2
Watchdog control register
Reserved
Auxiliary / switch register
Serial transmit buffer (byte)
Serial receive buffer (byte)
Serial interface control register 1
Serial interface status / control register
Serial interface control register 2
Reserved
Reserved
Rom bank switch register
Reserved
Voltage monitor control register
Voltage monitor status register
There are three different directional ports available:
Port 2 4-bit wide bitwise-programmable I/O port.
Port 5 4-bit wide bitwise-programmable bidirectional
Port 4 4-bit wide bitwise-programmable bidirectional
port with optional static pull-ups and program-
mable interrupt logic.
port also provides the I/O interface to Timer 2,
SSI, voltage monitor input and external interrupt
input.
Register Function
Rev. A3, 02-Apr-01
Module
ASW
Type
M2
M3
M3
M2
M2
M2
M1
M1
M1
M1
M1
M1
M1
M1
M1
M1
M2
M2
M3
M3
M3
Page
See
21
21
18
26
17
24
24
23
23
19
34
35
36
37
37
37
27
27
28
19
46
47
45
46
45
14
14
8