SST89E554RC-40-C-PI Microchip Technology, SST89E554RC-40-C-PI Datasheet - Page 51

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

Specifications of SST89E554RC-40-C-PI

• 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: PDIP-40
• Mounting Style: Through Hole
• 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
The table below summarizes various clock inputs at two common frequencies.
TABLE
CMOD’s four possible timer modes with and without the overflow interrupt enabled are shown below. This list
assumes that PCA will be left running during idle mode.
TABLE
The CCON register is associated with all PCA timer functions. It contains run control bits and flags for the PCA
timer (CF) and all modules. To run the PCA the CR bit (CCON.6) must be set by software. Clearing the bit, will turn
off PCA. When the PCA counter overflows, the CF (CCON.7) will be set, and an interrupt will be generated if the
ECF bit in the CMOD register is set. The CF bit can only be cleared by software. Each module has its own timer
interrupt or capture interrupt flag (CCF0 for module 0, CCF4 for module 4, etc.). They are set when either a match
or capture occurs. These flags can only be cleared by software. (See “PCA Timer/Counter Control Register
(CCON)” on page 27.)
©2007 Silicon Storage Technology, Inc.
PCA Timer/Counter Mode
Mode 0: f
Mode 1:
Mode 2: Timer 0 Overflows
Timer 0 programmed in:
Mode 3: External Input MAX
PCA Count Pulse Selected
Internal clock, f
Internal clock, f
Timer 0 overflow
External clock at P1.2
1. In Mode 2, the overflow interrupt for Timer 0 does not need to be enabled.
8-bit mode
16-bit mode
8-bit auto-reload
OSC
8-2: PCA T
8-3: CMOD V
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OSC
OSC
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/4
IMER
ALUES
1
/C
OUNTER
I
NPUTS
Without Interrupt Enabled
51
00H
02H
04H
06H
1 to 255 µsec
0.66 µsec
330 nsec
256 µsec
65 msec
12 MHz
1 µsec
CMOD Value
Clock Increments
With Interrupt Enabled
0.75 to 191 µsec
0.75 µsec
0.50 µsec
250 nsec
192 µsec
49 µsec
16 MHz
01H
03H
05H
07H
S71207-08-EOL
EOL Data Sheet
T8-2.0 1207
T8-3.0 1207
1/07