Z86E3312PSC View Datasheet(PDF) - Zilog
Part Name
Description
MFG CO.
'Z86E3312PSC' PDF : 84 Pages View PDF
CMOS Z8® OTP Microcontrollers
Product Specification
43
and P32 with reference to the voltage on P33. The analog function is enabled by setting
the D1 of Port 3 Mode Register (P3M). The comparator output can be outputted from P34
and P37, respectively, by setting PCON register Bit D0 to 1 state. For the interrupt func-
tion, P30 and P33 are falling edge triggered interrupt inputs. P31 and P32 can be pro-
grammed as falling, rising or both edges triggered interrupt inputs (see Figure 21). Access
to Counter/Timer 1 is made through P31 (TIN) and P36 (TOUT). Handshake tines for Port
0, Port 1, and Port 2 are also available on Port 3 (see Table 19).
Note: When enabling or disabling analog mode, the following is
recommended:
1. Allow two NOP decays before reading this comparator output.
2. Disable global interrupts, switch to analog mode, clear interrupts, and then re-enable
interrupts.
3. IRQ register bits 3 to 0 must be cleared after enabling analog mode.
Note: P33-P30 differs from the Z86C33/C43/233/243 in that there is no
clamping diode to VCC due to the EPROM high-voltage circuits.
Exceeding the VIH maximum specification during standard operating
mode may cause the device to enter EPROM mode.
PS022901-0508
Electrical Characteristics
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