z02201 ZiLOG Semiconductor, z02201 Datasheet - Page 33

• Manufacturer Part Number: z02201
• Description: Z02201 V.22bis Data Pump With Integrated Afe
• Manufacturer: ZiLOG Semiconductor

RAMI, RXI, and TXI Interrupts
PS000904-0107
the values of bit fields set by the data pump. Bits not defined above are reserved
or not available for use.
The host reads register Reg7 immediately before DATAP. The two CRC checksum
bytes in received HDLC frames are provided to the host.
At any reset, or when the host sets Config register, bits 0–6 (MODE) to 0
(STANDBY) the data pump sets TEND to
The three most significant bits in the RAM Control and data pump status registers
define the interrupt masks for RAMI, RXI, and TXI. A logical AND operation is
performed with the RAMIE, RXIE, and TXIE enable bits of the RAM Control regis-
ter and the corresponding interrupt bits in the DATA PUMP STATUS register. A log-
ical OR operation is performed on the outputs driving the HIRQ pin, providing an
interrupt to the host interrupt (See
Figure
V.22BIS Data Pump with Integrated AFE
0
9).
, RXERROR to
0
, and EOF to
0
.
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