Z87100 Datasheet, PDF (17/48 Pages) Zilog, Inc. – Wireless Transmitter

Zilog
Z87100
Wireless Transmitter
Stack. The Z87100 has an 8-bit Stack Pointer (R255) used Counter/Timers. There are two 8-bit programmable
for the internal stack that resides within the 124 general- counter/timers (T0-T1), each driven by its own 6-bit pro-
purpose registers.
grammable prescaler. The T1 prescaler can be driven by
internal or external clock sources, however, the T0 pres-
3
caler is driven by the internal clock only (Figure 14).
OSC
÷2
0
1 (SMR) D1
÷16
Internal Data Bus
Write
Write
Read
PRE0
Initial Value
Register
T0
Initial Value
Register
T0
Current Value
Register
1
0
(SMR) D0
÷4
Internal
Clock
(SCLK)
External Clock
6-Bit
Down
Counter
8-Bit
Down
Counter
÷2
IRQ4
TOUT
P36
Clock
Logic
÷4
Internal Clock
Gated Clock
Triggered Clock
TIN
P31
6-Bit
Down
Counter
8-Bit
Down
Counter
IRQ5
PRE1
Initial Value
Register
T1
Initial Value
Register
T1
Current Value
Register
Write
Write
Read
Internal Data Bus
Figure 14. Counter/Timer Block Diagram
DS96WRL0700
PRELIMINARY
3-17