TC1796
Peripheral Units (Vol. 2 of 2)
General Purpose Timer Array (GPTA)
User’s Manual 24-68 V2.0, 2007-07
GPTA, V2.0
The first 63 Local Timer Cells (LTC00 to LTC62) have the following inputs:
• A local input data bus (YI) carrying the local timer value of the adjacent LTC with
lower order number (YI of LTC00 is always 0000
H
)
• A TI input reporting the occurrence of a local timer value update of the adjacent LTC
with lower order number (TI of LTC00 is 0)
• A SI input used by the LTC in Compare Mode as enable line (SI of LTC00 is 0)
• Two action mode inputs (M1I, M0I) coming from the adjacent LTC cell with lower
order number (M1I and M0I of LTC00 are 0)
• An EI input reporting an event coming from the adjacent LTC with higher order
number
• A trigger/clock/enable input LTCkIN hooked to one of the following signals sources:
– External port lines
– GTC00 to GTC31 outputs
– Clock bus signals
– PDL0 or PDL1 outputs
– Internal GPTA kernel input signals INTx (x = 0-3)
Each LTC provides the following output signals:
• One data output line (LTCkOUT) that can be connected to:
– External port lines
– Inputs of an MSC module
– Outputs and/or inputs of Global Timer Cell inputs
• One LTC prescaler clock input (LTCPRE) for Timer Mode
• One service request line (SQT) triggered by a capture/compare event
• A local output data bus (YO) carrying the local timer value to the adjacent LTC with
higher order number or the value on YI
• A TO output reporting the occurrence of a local timer value update to the adjacent
LTC with higher order number
• An SO output used by the adjacent LTC with higher order number as enable signal
for a compare function
• An EO output reporting the occurrence of a local event to the adjacent LTC with lower
order number
• Two mode lines (M1O, M0O) going to the adjacent LTC with higher order number.
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