TS80C54X2YYY-MICD Atmel Corporation, TS80C54X2YYY-MICD Datasheet - Page 5

• Manufacturer Part Number: TS80C54X2YYY-MICD
• Description: 8-bit CMOS Microcontroller 16/32 Kbytes ROM/OTP
• Manufacturer: Atmel Corporation

Rev. C - 15 January, 2001
V
Vss1
V
P0.0-P0.7
P1.0-P1.7
P2.0-P2.7
P3.0-P3.7
Reset
MNEMONIC
SS
CC
39-32
21-28
10-17
DIL
1-8
20
40
10
11
12
13
14
15
16
17
1
2
9
PIN NUMBER
LCC VQFP 1.4
43-36
24-31
13-19
2-9
11,
22
44
11
13
14
15
16
17
18
19
10
1
2
3
Table 3. Pin Description for 40/44 pin packages
37-30
40-44
18-25
7-13
1-3
16
39
38
40
41
10
11
12
13
5,
5
7
8
9
4
TYPE
I/O
I/O
I/O
I/O
I/O
O
O
O
I
I
I
I
I
I
I
I
I
I
Ground: 0V reference
Optional Ground: Contact the Sales Office for ground connection.
Power Supply: This is the power supply voltage for normal, idle and power-
down operation
Port 0: Port 0 is an open-drain, bidirectional I/O port. Port 0 pins that have 1s
written to them float and can be used as high impedance inputs. Port 0 pins must
be polarized to Vcc or Vss in order to prevent any parasitic current consumption.
Port 0 is also the multiplexed low-order address and data bus during access to
external program and data memory. In this application, it uses strong internal
pull-up when emitting 1s. Port 0 also inputs the code bytes during EPROM
programming. External pull-ups are required during program verification during
which P0 outputs the code bytes.
Port 1: Port 1 is an 8-bit bidirectional I/O port with internal pull-ups. Port 1
pins that have 1s written to them are pulled high by the internal pull-ups and
can be used as inputs. As inputs, Port 1 pins that are externally pulled low will
source current because of the internal pull-ups. Port 1 also receives the low-order
address byte during memory programming and verification.
Alternate functions for Port 1 include:
T2 (P1.0): Timer/Counter 2 external count input/Clockout
T2EX (P1.1): Timer/Counter 2 Reload/Capture/Direction Control
Port 2: Port 2 is an 8-bit bidirectional I/O port with internal pull-ups. Port 2
pins that have 1s written to them are pulled high by the internal pull-ups and
can be used as inputs. As inputs, Port 2 pins that are externally pulled low will
source current because of the internal pull-ups. Port 2 emits the high-order address
byte during fetches from external program memory and during accesses to external
data memory that use 16-bit addresses (MOVX @DPTR).In this application, it
uses strong internal pull-ups emitting 1s. During accesses to external data memory
that use 8-bit addresses (MOVX @Ri), port 2 emits the contents of the P2 SFR.
Some Port 2 pins receive the high order address bits during EPROM programming
and verification:
P2.0 to P2.5 for A8 to A13
Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3
pins that have 1s written to them are pulled high by the internal pull-ups and
can be used as inputs. As inputs, Port 3 pins that are externally pulled low will
source current because of the internal pull-ups. Some Port 3 pin P3.4 receive
the high order address bits during EPROM programming and verification for
TS8xC58X2 devices.
Port 3 also serves the special features of the 80C51 family, as listed below.
RXD (P3.0): Serial input port
TXD (P3.1): Serial output port
INT0 (P3.2): External interrupt 0
INT1 (P3.3): External interrupt 1
T0 (P3.4): Timer 0 external input
T1 (P3.5): Timer 1 external input
WR (P3.6): External data memory write strobe
RD (P3.7): External data memory read strobe
P3.4 also receives A14 during TS87C58X2 EPROM Programming.
Reset: A high on this pin for two machine cycles while the oscillator is running,
resets the device. An internal diffused resistor to V
using only an external capacitor to V
NAME AND FUNCTION
CC.
TS80C54X2/C58X2
TS87C54X2/C58X2
SS
permits a power-on reset
5