ATAM862P-TNSY4D Atmel, ATAM862P-TNSY4D Datasheet - Page 14

• Manufacturer Part Number: ATAM862P-TNSY4D
• Description: IC MCU FLASH 4K TX 433MHZ 24SSOP
• Manufacturer: Atmel

Specifications of ATAM862P-TNSY4D

• Applications: UHF ASK/FSK
• Core Processor: MARC4
• Program Memory Type: FLASH (4 kB)
• Controller Series: MARC4 4-Bit
• Ram Size: 256 x 4
• Interface: SSI
• Number Of I /o: 11
• Voltage - Supply: 1.8 V ~ 4 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-SSOP
• Processor Series: ATAM862x
• Core: MARC4
• Data Bus Width: 4 bit
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

14.1
14.1.1
14.1.2
14.1.3
14.1.4
14
Differences between ATAM862-4 and ATAR862 Microcontrollers
ATAM862-4
Program Memory
Configuration Memory
Data Memory
Reset Function
The program memory of the devices is realized as an EEPROM. The memory size for user pro-
grams is 4096 bytes. It is programmed as 258 × 16 bytes blocks of data. the implement
LOCK-bit function is user-selectable and protects the device from unauthorized read-out of the
program memory.
An additional area of 32 bytes of the EEPROM is used to store information about the hardware
configuration. All the options that are selectable for the ROM versions are available to the user.
This includes not only the different port options but also the possibilities to select different capac-
itors for OSC1 and OSC2, the option to enable or disable the hardlock for the watchdog, the
option to select OSC2 instead of OSC1 as external clock input and the option to enable the
external clock monitor as a reset source.
The microcontroller block contains an internal data EEPROM that is organized as two pages of
32 × 16-bit. To be compatible with the ROM parts, the page used has to be defined within the
application software by writing the 2-wire interface (TWI) command “09h” to the EEPROM. This
command has no effect for the microcontroller block, if it is left inside the HEX-file for the ROM
version. Also for compatibility reasons, the access to the EEPROM is handled via the MCL
(serial interface) as in the corresponding ROM parts.
During each reset (power-on or brown-out), the I/O configuration is deleted and reloaded with
the data from the configuration memory. This leads to a slightly different behavior compared to
the ROM versions. Both devices switch their I/Os to input during reset but the ROM part has the
mask selected pull-up or pull-down resistors active while the MTP has them removed until the
download is finished.
4551G–4BMCU–07/07