AT89LP213 Atmel Corporation, AT89LP213 Datasheet - Page 72

• Manufacturer Part Number: AT89LP213
• Manufacturer: Atmel Corporation

Specifications of AT89LP213

• Flash (kbytes): 2 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 14
• Spi: 1
• Sram (kbytes): 0.125
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 2
• Isp: SPI/OCD
• Watchdog: Yes

23.7
Table 23-5.
Notes:
72
Address
00 – 01h
02 – 03h
04h
05h
06h
07h
08 – 0FH
10H
11H
12H
User Configuration Fuses
1. The default state for all fuses is FFh.
2. Changes to these fuses will only take effect after a device POR.
3. Changes to these fuses will only take effect after the ISP session terminates by bringing RST high.
4. AIN0 (P1.0) and AIN1 (P1.1) always reset to input-only mode. SS (P1.4) always resets to quasi-bidirectional mode.
AT89LP213/214
Fuse Name
Clock Source – CS[0:1]
Start-up Time – SUT[0:1]
Reset Pin Enable
Brown-out Detector Enable
On-chip Debug Enable
ISP Enable
RC Oscillator Frequency
Adjustment [0:7]
User Signature Programming
Tristate Ports
OCD Interface Select
User Configuration Fuse Definitions
(3)
(4)
The AT89LP213/214 includes 19 user fuses for configuration of the device. Each fuse is
accessed at a separate address in the User Fuse Row as listed in
by programming 00h to their locations. Programming FFh to fuse location will cause that fuse to
maintain its previous state. To set a fuse (set to FFh) the fuse row must be erased and then
reprogrammed using the Fuse Write with Auto-erase command. The default state for all fuses is
FFh.
(3)
(2)
Description
Selects source for the system clock:
CS1
00h
00h
FFh
FFh
Selects time-out delay for the POR/BOD/PWD wake-up period:
SUT1
00h
00h
FFh
FFh
FFh: RST pin functions as reset
00h: RST pin functions as general purpose I/O
FFh: Brown-out Detector Enabled
00h: Brown-out Detector Disabled
FFh: On-chip Debug Disabled
00h: On-chip Debug Enabled
FFh: In-System Programming Enabled
00h: In-System Programming Disabled (Enabled at POR only)
Adjusts the frequency of the internal RC oscillator. A copy of the 8MHz factory
setting is stored at location 0008h of the Atmel Signature.
FFh: Programming of User Signature Disabled
00h: Programming of User Signature Enabled
FFh: I/O Ports start in input-only mode (tristated) after reset
00h: I/O Ports start in quasi-bidirectional mode after reset
FFh: Fast two-wire interface
00h: Do not use
CS0
00h
FFh
00h
FFh
SUT0
00h
FFh
00h
FFh
Selected Source
Reserved
External Clock on XTAL1 (XCLK)
Internal RC Oscillator (IRC)
2 ms (XTAL); 512 µs (XCLK/IRC)
4 ms (XTAL); 1 ms (XCLK/IRC)
16 ms (XTAL); 4 ms (XCLK/IRC)
Crystal Oscillator (XTAL)
Selected Time-out
1 ms (XTAL); 16 µs (XCLK/IRC)
Table
23-5. Fuses are cleared
3538E–MICRO–11/10