SST89E554RC-40-C-NJ Microchip Technology, SST89E554RC-40-C-NJ Datasheet - Page 27

• Manufacturer Part Number: SST89E554RC-40-C-NJ
• Description: 8-bit Microcontrollers - MCU 32KB+8KB 40ns
• Manufacturer: Microchip Technology

Specifications of SST89E554RC-40-C-NJ

• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 40 MHz
• Program Memory Size: 32 KB
• Data Ram Size: 1 KB
• On-chip Adc: No
• Operating Supply Voltage: 4.5 V to 5.5 V
• Package / Case: PLCC-44
• Mounting Style: SMD/SMT
• Data Rom Size: 128 B
• Interface Type: SPI, UART
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Number Of Programmable I/os: 32
• Number Of Timers: 16 bit
• On-chip Dac: No
• Processor Series: FlashFlex
• Program Memory Type: Flash
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 4.5 V

FlashFlex MCU
SST89E564RD / SST89V564RD
SST89E554RC / SST89V554RC
Watchdog Timer Data/Reload Register (WDTD)
PCA Timer/Counter Control Register
©2007 Silicon Storage Technology, Inc.
Location
Location
D8H
85H
Symbol
WDTD
Symbol
CF
CR
-
CCF4
CCF3
CCF2
CCF1
CCF0
1. Bit addressable
CF
7
7
CR
6
Function
Initial/Reload value in Watchdog Timer. New value won’t be effective until WDT is set.
6
Function
PCA Counter Overflow Flag
Set by hardware when the counter rolls over. CF flags an interrupt if bit ECF in CMOD
is set. CF may be set by either hardware or software, but can only cleared by software.
PCA Counter Run control bit
Set by software to turn the PCA counter on. Must be cleared by software to turn the
PCA counter off.
Not implemented, reserved for future use.
Note: User should not write ‘1’s to reserved bits. The value read from a reserved bit is indeterminate.
PCA Module 4 interrupt flag. Set by hardware when a match or capture occurs.
Must be cleared by software.
PCA Module 3 interrupt flag. Set by hardware when a match or capture occurs.
Must be cleared by software.
PCA Module 2 interrupt flag. Set by hardware when a match or capture occurs.
Must be cleared by software.
PCA Module 1 interrupt flag. Set by hardware when a match or capture occurs.
Must be cleared by software.
PCA Module 0 interrupt flag. Set by hardware when a match or capture occurs.
Must be cleared by software.
5
5
-
1
(CCON)
Watchdog Timer Data/Reload
CCF4
4
4
27
CCF3
3
3
CCF2
2
2
CCF1
1
1
CCF0
0
0
S71207-08-EOL
EOL Data Sheet
Reset Value
Reset Value
00x00000b
00H
1/07