EZ-USB Datasheet, PDF (299/334 Pages) Cypress Semiconductor – The EZ-USB USB Integrated Circuit

The upper 3 bits of TL0 (or TL1) are indeterminate in mode 0 and must be masked when the
software evaluates the register.
CLK24
Divide by 12
Divide by 4
T0M (or T1M)
0
1
0
C/ T
1
T0 (or T1) pin
TR0 (or TR1)
CLK
TL0 (or TL1)
0
4
7
Mode 0
Mode 1
0 ^{TH0 (or TH1)} 7
GATE
INT0# pin
(or INT1#)
Figure C-1. Timer 0/1 - Modes 0 and 1
TF0 (or TF1)
INT
To Serial Port
(Timer 1 only)
C.2.4 Mode 1
Mode 1 operation is the same for Timer 0 and Timer 1. In mode 1, the timer is configured as a
16-bit counter. As illustrated in Figure C-1., all 8 bits of the LSB register (TL0 or TL1) are
used. The counter rolls over to all zeros when the count increments from FFFFh. Otherwise,
mode 1 operation is the same as mode 0.
EZ-USB TRM v1.9
Appendix C: 8051 Hardware Description
C-3